Waterproof Cooler Backpack
The JUNYUAN Waterproof Cooler Backpack is a hands-free insulated backpack cooler — 20+ liters (about 24 bottles or 20–36 cans), keeps drinks cold for 24+ hours (up to 48 hours with gel packs) behind a 100% leak-proof welded-seam body. OEM/ODM wholesale with custom logos from MOQ 500 pcs.
• High-Performance Insulation: 3-layer insulation in BPA-free, food-safe materials prevents heat exchange and keeps food and drinks cool for up to 3 days.
• 100% Leak-proof & Waterproof: The airtight, water-resistant zipper with easy-pull tab keeps the soft-sided backpack cooler leak-free.
• Impact Resistant: A waterproof, tough shell holds its own in rough outdoor conditions.
• Padded Shoulder Strap: Ergonomic shoulder straps and an adjustable chest strap add comfort and stability.
Description
Custom Logo Waterproof Cooler Backpack — 20L Insulated
This 20 L waterproof cooler backpack is a hands-free insulated pack for beer, drinks, ice and food on picnics, beach trips, tailgating, hiking and camping. It is built as a private-label promotional model — a soft-cooler format widely used by beverage, outdoor and events brands for custom-branded giveaways and retail SKUs.
Premium Cooling Performance
- Ice retention: holds contents below 4 °C for 24+ hours (up to 48 hours optimized) behind 40 mm closed-cell foam walls.
- Capacity: ~24 beer bottles (330 ml) or 20–36 cans with ice.
- Build: tear-resistant 600D polyester with food-grade PEVA lining, welded seams and an airtight zip.
- Extremes: withstands -20 °C to 80 °C ambient conditions.
- ECO option: recycled-fabric (RPET) exterior upgrade available.
Custom Branding Solutions
Turn the cooler pack into a promotional tool with flexible decoration: screen printing on the front pocket, heat transfer for full-color logos, embroidery on the shoulder straps, and rubber/TPU or woven labels. OEM/ODM branding starts at a MOQ of 500 pieces per design, with a free mockup on order confirmation.
User-Focused Design
- Ergonomic, padded shoulder straps and an adjustable chest strap for stability.
- External USB port, detachable dry bag and padded ventilated back panel.
- Leak-proof watertight zipper with an easy-pull tab.
Technical Specifications
| Specification | Value |
|---|---|
| Capacity | 20 L / ~21 L |
| Dimensions | 14″ H × 11″ W × 9″ D |
| Materials | 600D polyester + food-grade PEVA lining |
| Closure | Watertight zipper + top compression straps |
| Ice retention | <4 °C for 24+ hours (up to 48 h optimized) |
| MOQ | 500 pieces per design |
| Samples | 6–10 days after artwork approval |
| Bulk production | 35–50 days |
| Quality | AQL 2.5 under SGS-audited factory |
More Custom Cooler Choices
Sourcing & Manufacturing Depth
For the full sourcing picture on insulated packs, read our guide to custom cooler bag manufacturing in China and compare factory options in our list of top cooler bag factories for custom insulated bags. Need a larger everyday-carry option first? See our waterproof backpack manufacturing guide.
Additional information
| Logo Customization | MOQ 500pcs can accept logo customization |
|---|
The short answer for sourcing teams: the JUNYUAN Waterproof Cooler Backpack is a hands-free insulated backpack that carries 20+ liters — about 24 beer bottles (330 ml) or 20–36 cans with ice — and holds temperature below 4°C for 24+ hours (up to 48 hours in optimized conditions) behind 40 mm insulated walls. The 600D tear-resistant exterior, welded seams and airtight zipper make it leak-proof, while padded straps keep it comfortable for hiking, beach days, tailgating and promotional programs. It is built as a private-label model in our SGS-audited Quanzhou factory, MOQ 500 pieces.
Backpack coolers have become the fastest-growing soft-cooler format for outdoor brands because they leave hands free for gear; the category is commonly benchmarked by can capacity and ice-retention hours. Independent insulation guidance, such as the U.S. Department of Energy insulation guidance, shows that thicker closed-cell foam directly improves thermal resistance — the reason our backpack uses 40 mm walls rather than thin single-layer lining.
Frequently Asked Questions
What capacity and size is the cooler backpack?
How long does it keep drinks cold?
What branding options are available for wholesale?
Is the cooler backpack leak-proof and waterproof?
What is the sample and production lead time?
Can you supply eco-friendly or recycled fabric versions?
MOQ 500 pcs per design · samples in 6–10 days · SGS-audited Quanzhou factory. Get a free mockup and quote.