Why a custom waterproof bag?
Markets: paddling, cycling, beach, pet-care, corporate gifts—anywhere moisture is the enemy.
True IPX7-IPX8 welding: TPU or EVA film + high-frequency or hot-air sealing = no stitched holes.
100 % your look: fabric colour, thickness, buckle brand, print method, logo placement—every detail is a marketing touch-point.
27 years of factory know-how: waterproof zippers, air-release valves, laser-cut edges, reflective hits—we already stock the components that save you tooling fees.
The confusion most first-timers feel
“I don’t speak ‘fabric-ese’—which TPU gauge, which coil zip, which weld width?”
“Will sampling be expensive? Will the colour match? Will the bag really keep my gear dry?”
“What if MOQ is sky-high and I end up with 1,000 pieces I can’t sell?”
Relax. Send us any kind of sketch or reference and we will hand you a checklist; every later step has a template and a single point of contact.
Our road-map in two clear stages
A. Prototype stage
Step 1 – Design intake
Hand-drawn doodle, competitor link, PowerPoint, or a physical sample you mail over—everything works.
Tell us: size (L×W×H or litres), waterproof level (splash / rain / submersion), colour codes (Pantone or RAL), logo size & position, special hardware (YKK, Duraflex, WooJin, ITW).
Within 48 h we return: a 3-view CAD, material spec sheet, and a prototype quotation (breakdown: material, labour, tooling, courier).
Step 2 – Sample build
10–20 days in the sample room (queue depends on season).
We share mid-process photos: welded seam test, zip alignment, buckle pull test—so there are no surprises when the parcel lands.
You receive 1–2 pieces by air; typical freight to Hamburg (or any EU city) USD 30–80, 10–15 days door-to-door.
Step 3 – Data lock for bulk
Once you approve the prototype we immediately send the final MOQ, unit price, production lead-time and sea-freight cost to Germany.
These numbers are written into the pro-forma invoice and remain frozen—even if material prices inch up later.
B. Bulk-production stage
Step 4 – Paperwork & deposit
Sign the bulk contract, colour/artwork approval sheet, and packaging instruction.
Deposit by T/T; we open purchase orders for material and dies the same day.
Step 5 – Production & QC
Parallel processes: fabric lamination (3 days), die/mould cutting (2 days), high-frequency welding (10–15 days), final assembly & hardware (5–8 days).
Three checkpoints: incoming material inspection, 100 % air-pressure waterproof test (inflate to 0.25 bar, no leak for 30 s), AQL 2.5 random pull/zip/colour audit.
Daily photo/video update; you see your goods being born.
Step 6 – Shipment & balance
Cartons labelled with your EAN/UPC, FNSKU or shipping marks; palletized if required.
Balance payable against copy of B/L. Sea freight to Hamburg or Bremerhaven 40–50 days; we also offer rail (28 days) or air-cargo (7 days) if you hit a stock-out crisis.
The most important thing at the very beginning – how to settle the design
Do not wait for a perfect technical drawing; send whatever you have right now.
We maintain a live folder of 200+ past waterproof bags—pick the closest shape, scribble the changes on the photo, and we turn it into a measurable file.
Prefer a real object? Courier it to our sample room; we will unpick seams, measure gauges, photograph each layer and send you a “before vs. after” upgrade proposal.
Within 24 h you get: material swatches (glossy TPU, matte TPU, recycled TPU, PVC-free), colour card, buckle chips, and a short video showing waterproof zippers in action.
Everything is negotiable: strap width, weld pattern, print technology (silk-screen, digital, embossed, laser-etched), even the air-valve position. Think of the first file as a conversation starter, not a final decree.
Summary
Prepare any kind of design ,hand sketch, competitor link, or existing sample is OK. We will guide you through prototype → approval → bulk, with fixed prices and open communication at every step. You can comment, tweak or halt at any stage; no rush, no hidden cost.
Mail your rough idea to info@coolerbagmanufacturer.com today, and we will return a detailed roadmap within 24 hours. Let’s turn your concept into a retail-ready waterproof bag that keeps contents dry—and your brand image spotless.
