
Maelstrom
Maelstrom 23L Expandable Insulated Lunch Bag — Leakproof, Foldable Double‑Deck Cooler Tote with Shoulder Strap & Multiple Pockets
The Maelstrom 23L Lunch Bag is an insulated, leakproof lunch tote for carrying meals, drinks, ice packs and snacks for work, school, travel or outdoor use, with a double-deck design that can be expanded for additional storage. Constructed with a waterproof nylon exterior and a thickened PEVA insulating liner using seamless ultrasonic welding, it measures 12.6 × 9.8 × 9.8 inches (L × W × H) collapsed and expands to 12.6 × 9.8 × 11.8 inches for a 23 L capacity; key features include reinforced internal support to stand upright, SBS zippers, an interior mesh zipper pocket, two side pockets (one mesh for bottles and one for paper towels), front pockets with a keychain and cutlery storage, detachable adjustable shoulder strap and top handle, and a manufacturer claim of up to 16 hours of thermal retention.
- Material
- Waterproof nylon exterior with thickened PEVA insulating liner and seamless ultrasonic welding
- Gender
- unisex
- Category
- Luggage & Bags > Shopping Totes
- GTIN
850034374383- MPN
MAELSTROM-850034374383-NEWOVERSTOCK-NOBOX
Specifications
23L insulated, leakproof lunch tote with waterproof nylon exterior, PEVA insulating liner, expandable double-deck storage, reinforced structure to stand upright, and multiple pockets plus detachable shoulder strap.
Expandable double-deck main compartment (12.6 x 9.8 x 9.8 in; expands to 12.6 x 9.8 x 11.8 in) with thickened PEVA insulation and seamless ultrasonic welding for leakproof performance; reinforced bone for upright structure; SBS zippers; internal mesh lid pocket; two side pockets (mesh bottle pocket and paper-towel pocket); front keychain pocket and separate cutlery pocket; detachable/adjustable shoulder strap and top handle; keeps contents cold or warm up to 16 hours.
- Material
- Waterproof nylon exterior with thickened PEVA insulating liner and seamless ultrasonic welding
- Occasion
- work, everyday, workout
- Gender
- unisex
- Age Group
- adult
- Condition
- new
- Dimensions
- 12.6x9.8x11.8 in
- Category
- Luggage & Bags > Shopping Totes
Additional Attributes
- insulated (thickened PEVA insulating liner)
- leakproof with seamless ultrasonic welding
- waterproof nylon exterior
- expandable upper compartment (double-deck)
- reinforced zipper (SBS zipper)
- reinforced bone to stand upright
- holds up to 23L when expanded
- multi-pocket organization (internal mesh pocket in lid, two side pockets, front keychain pocket, front cutlery pocket)
- detachable and adjustable shoulder strap
- top carry handle
- keeps food cold or warm up to 16 hours
- foldable
- lightweight and wear-resistant exterior
Image Analysis
6 images- 01high

Product photo of a soft-sided insulated cooler/lunch bag (black) with the top lid unzipped to show a silver insulated lining and food inside (oranges, grapes, a green can, and a food container). The bag has a front zip pocket, adjustable shoulder strap, short carry handles, metal zipper hardware, and a small leather logo patch. Six small thumbnails along the right show the bag in different colors/patterns.
OCR: nullsoft-sided insulated cooler bag / lunch bagzippered top lid (open)silver reflective insulated liningfront flap pocket with zipperadjustable shoulder strapdual carry handles (short handles)metal zipper pullsleather logo/brand patch on front pocketside pocketsrectangular main compartmentremovable/adjustable strap hardware (metal D-rings/buckles)orange fruit (oranges)red grapesgreen aluminum can (beverage)food container/stacked containers insidewhite studio backgroundsix small product color/pattern thumbnails (right side)black fabric exterior (main bag in primary image)stitching and seams on bag- 02high

Side-by-side product image of a black soft insulated cooler/lunch bag shown in two configurations: left is the collapsed (normal) size (18L) and right is the expanded size (23L). Dimension lines and measurements are displayed (12.2 x 9.06 x 10.24 in normal; 12.2 x 9.06 x 11.81 in expanded). The bag features top handles, a detachable shoulder strap, front and side zip pockets, double zipper pulls, and a brown leather patch.
OCR: Before expansion After expansion 18L Normal Size 12.2*9.06*10.24 in 23L Expanded Size 12.2*9.06*11.81 in 12.2 in 9.06 in 10.24 in 11.81 inblack soft-sided cooler / insulated lunch bag (two views)left view: collapsed (before expansion)right view: expanded (after expansion)top carrying handles (joined)detachable/adjustable shoulder strapfront zipper pocketside zipper pocketdouble zipper pulls on main compartmentexpansion zipper section (middle zipper) on expanded viewbrown rectangular leather/logo patch on front pocketmetal zipper pulls (silver)measurement arrows and dimension labels (12.2 in, 9.06 in, 10.24 in, 11.81 in)capacity labels (18L, 23L)icons indicating expandable feature (square with arrows)text captions: 'Before expansion' and 'After expansion'light gray/white studio backgrounddivider band with circular expansion icon between the two product views- 03high

Product images showing a black multi-pocket backpack/diaper bag from front and back, with numbered callouts and six inset thumbnails illustrating specific pockets/features: small front zipper pocket, front pocket with keychain (contains snacks), back tablet pocket, side tissue pocket, side mesh pocket (with bottles), and inside mesh (insulated) pocket.
OCR: 01 02 03 04 05 06 1 2 3 4 5 6 Small Front Zipper Pocket Front Pocket with Keychain Back Pocket Side Tissue Pocket Side Mesh Pocket Inside Mesh Pocketblack multi-pocket backpack / diaper bagfront view of bagback view of bagtop carrying handle (dual handles)main zipper compartment (top)small front zipper pocketfront pocket with keychain (open with snacks inside)back pocket (shown holding a tablet)side tissue pocket (with tissue pack)side mesh pocket (holding bottles)inside mesh pocket (insulated lining shown with utensils/plates)zipper pulls (metal/silver)leather logo/patch on fronttablet (silver/gray) in back pocketsmartphone (blue) in small front pocketsnack items inside front pocket (chips/snacks)juice/bottle drinks (in side mesh pocket)callout markers / numbered labels (01–06, 1–6)white backgroundproduct feature inset thumbnails (6 small images showing pockets/features)- 04high

Top-down product image showing an open black soft-sided insulated cooler with a silver/gray interior liner containing several beverage cans, two apples, two oranges, and a small cluster of red grapes submerged in standing water to demonstrate leakproof performance. Below the cooler is a comparison graphic (Seamless Ultrasonic Welding vs Sewing Technology) and a large claim reading '100% LEAKPROOF.'
OCR: 100% LEAKPROOF Seamless Ultrasonic Welding Sewing Technologyinsulated cooler bag (soft-sided)open zipper and lidsilver/gray interior lining (insulated)black exterior fabric and handlealuminum beverage cans (with silver tops, green bodies)red apples (2)oranges/mandarins (2)red grapes (small cluster)standing water inside cooler (demonstration of leakproof)top-down / overhead view into bagproduct comparison graphic (two small panels)check mark and cross icons in comparison graphiclarge text claim: '100% LEAKPROOF'white background beneath product image- 05high

Product-style image showing a black insulated cooler/lunch bag in front of a cutaway illustration of its layered insulation (rip-stop nylon, waterproof PVC, 5mm EPE foam, 210D liner, food-grade PEVA). An arced blue-to-red gradient graphic above indicates temperature retention with the headline 'Stay Cold for up to 16 Hours' and labels 'Keep Cold' (left) and 'Keep Warm' (right).
OCR: Stay Cold for up to 16 Hours Keep Cold Keep Warm Rip-stop Nylon Fabric Waterproof PVC 5mm EPE Foam Middle Layer 210D Liner Food-grade PEVA Materialsinsulated cooler bagsoft-sided lunch/cooler bagadjustable shoulder straptop carrying handlesdouble zipper pulls (main compartment)front zippered pocketside pocketsmall rectangular leather/logo patch on frontdiagram of layered materials (stacked layers)layer callout dots and linesarced temperature gradient graphic (blue to red)text headline at topwhite background / product photo studio settingmetallic zipper hardwarefoam layer texture (depicted)fabric layer texture (rip-stop)pointer labels for each layer- 06high

Product-style image showing a black insulated lunch/cooler bag on a light tabletop with fruit, juice, crackers, and a cookie container arranged around it; a headline reads "Keep Your Mealtime Fresh and Fun" and three inset feature images below highlight Fabric Tear Resistance, Waterproof, and Easy to Clean.
OCR: Keep Your Mealtime Fresh and Fun Fabric Tear Resistance Waterproof Easy to Clean NFCblack insulated lunch bag / cooler totetop handle on bagdouble zippers / zipper pullsfront zipper pocketside pocketsleather brand patch on bagplate with crackersred/purple grapes on platewhite plateclear bottle with yellow/orange juice (label reads "NFC")carton of orange juice (orange/blue packaging)red appletwo small oranges / tangerinessmall green-lidded container with cookieslight beige tabletoplight gray / white marble textured backgroundlarge headline text: "Keep Your Mealtime Fresh and Fun"three inset feature images/icons (fabric tear resistance, waterproof, easy to clean)inset caption: "Fabric Tear Resistance"inset caption: "Waterproof"inset caption: "Easy to Clean"inset image of hands pulling fabric (tear resistance)inset image of water droplets on fabric (waterproof)inset image of sauce being peeled off (easy to clean)
Brand PDP Lookup
- Brand
- Maelstrom
Maelstrom 23L Lunch Bag
Documents & Data
Customer Reviews
50 reviews · out of 5
Fast delivery
Order arrived in 2 days and looked perfect.
Fast and efficient
Got my item fast and it was in excellent shape.
Very happy
Really happy with my order. Shipped fast and clean.
Stroller came super fast and I love it
Stroller came super fast and I love it
Bouncer worked fine
Bouncer worked fine. Was a little worried when it showed up but it was perfectly fine!
The products were very good
The products were very good. More than I’d expected them to be. The color of the diaper bag is beautiful and I know my daughter in love will be happy with it.
Everything was great
Fast shipping, clear product info, no surprises.
Great service
I’m so happy with my experience. Kidsy shipped my order quickly and it was in great condition.
Smooth purchase
Smooth from checkout to delivery.
Great product
I was impressed with the shipping and the item I got looked brand new. Great product and I’ll be ordering again.
Great deals, easy to use site
Great deals, easy to use site
Good prices and fast shipping
Good prices and fast shipping
Would buy again
Everything was smooth and the item was as described.
Exactly what I needed
Found the exact baby item I needed for half the cost.
Quick and easy
Couldn’t believe how simple the process was.
Just like described
Item matched the listing perfectly.
Would recommend
Already told two friends about Kidsy.
My item shipped very quickly and I…
My item shipped very quickly and I received it about 3 days after I ordered it! It came in an extra protected box as well! Very pleased with my purchase!
Item was like new
Bought a swing and it looked untouched. So happy.
Perfect
Everything arrived exactly as expected.
Was just as described
Was just as described. Quick shipping and communication.
Quick response
Ordered a gate prior to this one, UPS lost it on route. I reached out to Kidsy via email and they secured a refund from UPS. Was hesitant to order again, but I couldn't find the gate at a more reasonable price. 2nd order arrived with no issues. Gate is sturdy and the dog (Husky) hasn't gotten through it (he's an escape artist). Quick delivery from start to finish.
Better than expected
Everything came packaged well, looked brand new. Super impressed.
Love my stroller
Love my stroller. Great deal and great service.
less money less hassle
Found an item still in its original packaging for 2/3 of the original pricing.
I appreciated the detailed description
I appreciated the detailed description, I knew I was getting a floor model and it came in perfect shape at a much reduced cost. When I thought the cupholders weren't included, I reached out to them and then we found them and they were very responsive and thankful that I let them know. Everything is fine.
Easy process
Super easy to order. Arrived on time and in great shape!
I purchased a glider
I purchased a glider. It was described accurately, shipping was fast and price was great!
The best prices going and shipping is…
The best prices going and shipping is fast.
Worth it
Got a like-new monitor for under $50.
Great for parents
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Safer and easier than buying used on Facebook.
Amazing value
Saved a ton on a big item. Thank you, Kidsy!
So grateful
Found what I needed at a price I could afford.
Holly
Stocked my home for visits from the grandkids.
Quick delivery and items in great…
Quick delivery and items in great condition!
Was pleased with the car seat I bought…
Was pleased with the car seat I bought from Kidsy. It was in the condition they described and arrived quickly. Thank you!
Thank you!
Thank you! Great prices and great items.
Kidsy Customer Service Review
Kidsy had a great selection of deeply discounted baby gates. Unfortunately, there was a piece missing when I received my package. I didn't realize it until after the 14 day return/exchange window. But I reached out, and they were willing to send me the piece anyway at no extra charge. I really appreciated the customer service.
Good experience
Item arrived just as described. Couldn’t be happier.
Love Kidsy!
I’ve ordered a few items from Kidsy now and all have been great.
Great price and fast delivery.
Great price and fast delivery.
Kidsy had exactly the baby/pet gates we…
Kidsy had exactly the baby/pet gates we needed...good price...good shipping...good items. If you have children or know someone who has children...this site is a keeper! They get 10 stars!!
Highly recommend
A friend told me about Kidsy and I’ve already ordered twice.
Looks like new
Couldn’t believe how good the condition was.
So easy to use
Website is easy to use, items are great quality, and shipping is fast.
Great, trustworthy experience
Great deals, easy checkout with lots of payment options, shipped very quickly, and everything was packed well and looked exactly as it was described! I didn't end up needing any intervention with my shipping experience but appreciate the option to cover lost packages for a minimal fee, especially as we get into the late and lost package holiday season. I'll definitely be getting more of my baby gear from Kidsy.
Looks unused
Couldn’t even tell the stroller had been returned.
Good stuff
Love the gear I got for my twins.
Great deal
Got a travel system for a great price. Would recommend Kidsy.
Q&A
7 answered7 Questions Answered
4 high confidence · 4 web-sourced
What are the usable internal volumes (in liters) when the bag is collapsed versus expanded to the 23 L claimed capacity?
Using the listed internal dimensions, collapsed (12.6 × 9.8 × 9.8 in) the usable volume is about 1,210 in³ ≈ 19.8 L; expanded (12.6 × 9.8 × 11.8 in) the usable volume is about 1,457 in³ ≈ 23.9 L (the listing rounds this to a 23 L capacity).
product_features / product_description (listed dimensions and claimed 23 L capacity)
Are the ultrasonic‑welded seams fully waterproof — i.e., can melted ice or liquid pool in the bag without leaking from the seams or bottom?
We use a thickened PEVA liner with seamless ultrasonic‑welded seams and a reinforced base, and this lunch bag is designed to be leakproof so normal melted ice or small spills should remain inside rather than seeping from the seams or bottom. For pooled liquids or long periods of melting, we recommend keeping drinks/loose ice in sealed containers or using an ice pack/absorbent towel — like any soft‑sided cooler, it’s not intended to be submerged or to hold large volumes of free liquid indefinitely.
product_description; product_features
What are the interior usable dimensions (L×W×H) of each deck, and how many common meal containers (for example, 1‑liter rectangular containers or 32‑oz tumblers) fit per deck?
Using the bag’s listed overall footprint and expansion, the usable floor area of each deck is about 12.2 × 9.4 in (L × W). The bottom (fixed) deck’s usable height is roughly 5.8 in; the top deck is about 3.6 in when collapsed and about 5.6 in when expanded (the top adds ≈2 in when unzipped). Practically, that means each deck will comfortably hold about two typical 1‑L rectangular meal containers laid flat side‑by‑side (Sistema 1L ≈ 6.9 × 4.6 × 3.15 in) and roughly two 32‑oz tumblers if placed on their sides — 32‑oz tumblers (commonly ~7.5–8.8 in tall) generally will not fit standing upright. These are approximate usable interior measurements calculated from the bag’s published external dimensions and common container sizes; exact fit depends on the specific container model and lids.
Sources
brand product page (dimensions/expansion) and container-size references (Sistema 1L, typical 32‑oz tumblers).
How was the "keeps contents cold or warm up to 16 hours" rating measured (conditions, ambient temperature, and whether that included ice packs or just the liner)?
The listing states the bag “keeps contents cold or warm for up to 16 hours,” but the manufacturer’s product page and major retailer listings do not publish the test protocol (ambient temperature, starting temperatures, or whether ice packs were used). [1][2][3] Because those conditions aren’t specified, we can’t confirm how that 16‑hour number was measured; for reliable long retention in real use, plan to start with chilled food/beverages and use frozen ice packs since thermal time depends heavily on ambient temperature and initial temperatures.
Sources
Brand product page and retailer listings show the 16‑hour claim but do not publish testing conditions or protocol.
Is the PEVA liner removable for cleaning, and what are the recommended cleaning instructions (wipe clean, hand wash, machine wash, or dishwasher safe)?
This Maelstrom 23L Lunch Bag has an integrated PEVA liner that is ultrasonically welded (seamless) and not removable. The liner is “smooth and easy to clean,” so we recommend wiping the interior with a soft cloth or sponge, mild soap and warm water, then rinsing and air‑drying completely before storing. Avoid machine washing, tumble drying, dishwashers, bleach, or long soaking to protect the PEVA liner and the welded seams.
product_description; product_features
What is the empty weight of the bag and the maximum recommended load capacity (in lbs or kg) for the shoulder strap and handles?
We don’t publish an empty weight or a rated maximum load for the shoulder strap/handles on the Maelstrom 23L product page. Retail listings show the empty bag weighs about 1.5–1.68 lb (≈0.68–0.76 kg).[2][3] Because we do not provide a manufacturer-rated strap/load limit, we recommend keeping carried contents to roughly 10–15 lb (≈4.5–7 kg) to avoid stressing the strap or handle — that guidance follows typical lunch-bag recommendations. [4]
Sources
- [1]Maelstrom 23L Lunch Bag — official product page (no published weight or strap-load spec)
- [2]Target listing — Maelstrom Expandable Double Deck Insulated Lunch Bag (estimated ship weight 1.68 lb)
- [3]eBay listing — Maelstrom Lunch Box (item weight ~1.54 lb)
- [4]Garrett Specialties product spec showing a typical lunch-bag recommended weight tolerance (~11 lb)
brand product page (no published weight/load); retailer listings (Target, eBay) for item weight; similar product spec (Garrett Specialties) for typical recommended weight guidance
Are the shoulder‑strap attachments and zipper pulls metal or plastic, and are the SBS zippers water‑resistant/coated or fitted with storm flaps?
We use SBS zippers on this bag; the zipper pulls are metal (silver-tone) while the detachable shoulder‑strap attachments use black plastic swivel clips. The zippers are standard SBS zippers (not shown as rubberized/water‑resistant or fitted with storm flaps) in the product photos and description. [1][2]
Sources
Maelstrom official product page (specifies SBS zippers) and Walmart product images showing metal zipper pulls and plastic strap clips