Sealock makes custom cooler bags for outdoor and drinkware brands, retailers, beverage and food companies, and promotional programmes that need a cooler people will keep using. Our soft coolers have a high-frequency welded shell and a welded food-grade liner, so they hold meltwater without leaking, and they can be built in your size, colours and insulation level, with your logo or a full-wrap print. Our minimum order is 300 pieces per design. That suits a brand's product line, a retail range or a large branded programme; it does not suit an order of a few dozen printed lunch bags.
This page explains the decisions in the order they come up: which construction, what can be customised, which logo and print methods work on a cooler, what drives the price, and how long an order takes. We have made welded bags since 2001, over 20 years, at our factories in Dongguan, China and Ho Chi Minh City, Vietnam.
Two Kinds of Custom Cooler Bag
Most branded cooler bags on the market are sewn: a printed polyester outer, a thin foam layer and a stitched foil or PEVA lining. They are inexpensive and fine for carrying a lunch, but the stitched lining leaks when ice melts, and the insulation holds cold for a few hours. They are the right product for a low-cost giveaway.
A welded soft cooler is a different product. The outer shell is TPU-laminated fabric joined by high-frequency welding, the liner is a single welded piece of food-grade TPU, and between them sits 15 to 20 mm of closed-cell foam. With an airtight zipper the cooler is leakproof in any position and holds ice for up to about 48 hours; with a roll-top or flip lid it is leakproof when upright and easier to open. This is the construction outdoor brands sell at retail, and it is the one a company chooses when the cooler has to represent the brand for years. We specialise in welded coolers, and our sewing lines add the harnesses, pockets and straps to the same standard, or build sewn cooler bags where a lighter, lower-cost product is the brief.
What You Can Customise
| Element | Options |
|---|---|
| Format | Personal cooler, tote, backpack, roll-top, flip-lid, barrel, fish bag |
| Size | From about 10 litres (12 cans) to 30 litres (36 cans) and larger; sized by can count, bottle height or meal boxes |
| Insulation | 15 mm or 20 mm closed-cell foam as standard; thicker foam or eutectic cold plates for longer holding times |
| Closure | Airtight zipper (leakproof in any position), roll-top, or zip-around flip lid |
| Shell and liner | 840D TPU or TPU-laminated nylon in Pantone colours; food-grade TPU liner; recycled TPU on request |
| Carry and features | Shoulder strap, backpack harness, waist strap, bottle opener, tie-down points, dry pocket, mesh pocket |
| Packaging | Hangtag, colour box, gift box, barcode and carton marks for retail or corporate gifting |
Starting from an existing model and changing the colour, logo and details is the fastest route. A cooler developed from your own drawing or sample is also possible; a new shape needs new welding tooling and a longer sampling stage, so allow more time.
Logo and Print Methods on a Cooler
On a welded cooler, nothing may be stitched through the shell, so the logo methods are the ones that leave it intact. Silk-screen printing is durable and economical for a logo in one to three colours. Heat transfer handles multi-colour and gradient artwork. A welded TPU or silicone logo patch gives a raised mark and suits retail products. Embossing presses the logo into the shell with no ink at all. For promotional and vending programmes where the whole cooler is the advertisement, full-wrap UV digital printing covers all four walls with photographic artwork; our printed cooler backpack is built for that.
Send artwork as a vector file with Pantone references, and tell us where on the cooler it should sit and how large. Our guide to logo methods on waterproof bags compares how each one wears.
MOQ, Sampling and Lead Time
MOQ is 300 pieces per design. Samples take about 7–15 days for a cooler based on an existing model. Bulk production takes about 30–45 days after sample approval, and up to 60 days for a complex new design or a peak-season order. Coolers sell in spring and summer, so brief in autumn or winter for the following season. Production can be placed in China or in Vietnam, which gives buyers a choice of origin when planning for tariffs. Brand customers review our soft cooler lines on site; you can read about one such visit in our report on YETI's review of soft cooler production at our Vietnam facility.
We do not offer "no minimum" orders. For fewer than 300 pieces, a promotional products distributor that prints on stock cooler bags is the better route.
What Drives the Price
The closure is the largest single factor: an airtight zipper costs considerably more than a roll-top or a standard zip. After that come the size, the insulation thickness, the shell material, the carry system (a backpack harness costs more than a shoulder strap), the print method and coverage, the packaging and the quantity. A welded cooler costs several times as much as a sewn promotional lunch bag, and it is priced to be sold at retail or given as a serious corporate gift. To quote accurately we need the format, size or can count, closure, artwork, quantity and target price.
Base Models You Can Customise
| Image | Model | Capacity | Dimensions (H × W × D) | Weight | Construction | Use |
|---|---|---|---|---|---|---|
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SL-I015 10L Soft Cooler | 10 L; about 12 cans | 25 × 30.5 × 20 cm (9.8 × 12.0 × 7.9 in) | 0.9 kg (2.0 lb) | TPU-laminated nylon, high-frequency welded; 15 mm closed-cell foam; airtight zipper; IPX7 | Personal cooler; corporate gifts |
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SL-I032 Waterproof Soft Cooler Bag | 12 / 15 / 20 L | 20 L: 30 × 36 × 26 cm (11.8 × 14.2 × 10.2 in) | 1.0 / 1.2 / 1.4 kg (2.2 / 2.6 / 3.1 lb) | TPU-laminated nylon, single-piece welded liner; 15 mm foam; airtight zipper; IPX7; 48+ hours ice (20 L) | A three-size retail range |
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SL-I230 Waterproof Soft Cooler Tote | 24 L; about 30 cans | 32 × 39 × 29 cm (12.75 × 15.5 × 11.5 in) | About 1.8 kg (4.0 lb) | 840D TPU, high-frequency welded; 20 mm XPE foam; airtight zipper; IPX7; up to 48 hours ice | Boat, beach and tailgate |
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SL-I093 Flip-Lid Cooler Tote | 30 L; 36 cans plus ice | 41 × 44 × 26 cm (16.1 × 17.3 × 10.2 in) | About 1.9 kg (4.2 lb) | 840D TPU, welded liner; closed-cell EPE foam; flip lid with 55 cm opening; IPX6; up to 36 hours ice | Group outings and events; bottle opener |
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SL-I272 Roll-Top Cooler Backpack | 16 L; about 16 cans | 47.5 × 30 × 21.5 cm (18.7 × 11.8 × 8.5 in) | 1.4 kg (3.1 lb) | TPU-laminated nylon, high-frequency welded; 15 mm foam; roll-top; IPX6; about 36 hours ice | Hiking, paddling, hands-free carry |
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SL-E050B Custom Printed Cooler Backpack | 25 L or 16 L | 25 L: 32 × 37.5 × 26.5 cm (12.6 × 14.8 × 10.4 in) | 1.4 kg / 1.1 kg (3.1 / 2.4 lb) | TPU laminated shell, high-frequency welded; EPE foam; moulded flip lid; full-wrap UV print | Promotional and vending programmes |
See more formats in our waterproof cooler and cooler backpack ranges. For anglers and charter fleets, our guide to the fish kill bag covers insulated fish cooler bags, and for a matching summer range, see custom beach bags.
How We Control Quality
Every order passes through IQC on incoming TPU fabric, foam, liner film, zippers and webbing, IPQC during welding, sewing and assembly, and OQC on finished coolers, with SGS or QIMA third-party inspection available on request. Welded seams on the shell and liner are tested for tensile and bonding strength. Handles, straps and harness anchors go through a load test of 1,500+ cycles, and zippers, including airtight zippers, are opened and closed 3,000 times. Hardware is tested in salt spray, the shell for abrasion, and colour fastness and colour difference are checked against the approved sample and colour card, which matters most on printed and brand-colour coolers. IPX7 coolers are verified with a full water-immersion test of 2+ hours and IPX6 coolers with a heavy rain and water-jet test.
Frequently Asked Questions
What is the minimum order for custom cooler bags?
300 pieces per design. Colours can usually be split within one order.
How much do custom cooler bags cost?
The price depends on the closure, size, insulation, material, carry system, print method and quantity. An airtight-zipper cooler costs more than a roll-top or flip-lid one. Send us your specification, artwork and quantity for a quotation.
Can you print our logo on a cooler bag?
Yes, by silk screen, heat transfer, welded patch or embossing, or as a full-wrap UV print covering the whole cooler.
Are your cooler bags leakproof?
Yes. The liner is a welded piece of food-grade TPU with no stitching. Airtight-zipper models are leakproof in any position; roll-top and flip-lid models are leakproof when upright.
How long do custom cooler bags keep ice?
About 24 to 48 hours depending on the model, insulation thickness and conditions. Thicker foam can be specified for longer holding times.
How long does a custom order take?
About 7–15 days for samples and 30–45 days for bulk production after approval, or up to 60 days for a complex new design.
Start Your Custom Cooler Bag Order
Send us the format, size or can count, closure, logo artwork and quantity, and we will reply with a recommendation and a quotation, then make branded samples and plan production in China or Vietnam. Contact us at info@sealock.com.hk or call +86-769-82009361.