Leakproof Lunch Box with Thermal Lining

Why choose SEALOCK COOLER instead of a regular supplier?

✔ Dual factories in China and Vietnam to reduce tariffs

✔ 20+ years of experience in waterproof and insulated products

✔ Automated equipment + skilled workers for more stable delivery times

✔ Familiar with European and American brand quality standards

We don't pursue one-time orders, but long-term cooperation.

What are the advantages of our products?

1. Truly effective insulation performance

We are a manufacturer specializing in cooler bags and waterproof bags, so insulation is our core competency.

Multi-layer composite insulation structure

High-density insulation cotton

Seamless high-frequency welded inner liner

Sealed structure design

In daily commuting or outdoor environments, the Lunch Box can stably maintain hot or cold temperatures for 8–24 hours, far exceeding the performance of ordinary fabric lunch bags.

2. Leak-proof and waterproof for true usability

A leaky lunch box renders it useless.

Therefore, we have very strict sealing requirements:

Waterproof TPU/PEVA inner liner

Zipper passes fatigue life testing

Welded parts do not rely on glue

This is also why many customers choose us as their long-term supplier.

3. Lightweight and foldable, more suitable for real life

Compared to traditional hard lunch boxes:

Lighter weight

Foldable for storage

Saves space

Very convenient for putting in backpacks, cars, or office drawers.

Certifications and Quality Assurance

As a manufacturer that has long served the international market, we have passed:

1. ISO 9001 Quality Management System
2. BSCI / SMETA Social Responsibility Certification
3. Higg Index Environmental System

We also hold IPX8 waterproof-related patents and have our own laboratory for testing the Lunch Box:

1. Zipper life test
2. Peel strength test
3. Dry/wet color fastness test
4. Salt spray test

All data is traceable, ensuring stable delivery of every batch of products.

FAQ

Q1: Are you a factory or a trading company?

We are a manufacturer with our own factories in China and Vietnam.

Q2: Can the Lunch Box be customized?

Yes, customization of size, color, LOGO, and structure is supported.

Q3: How long is the sample lead time?

Usually 10–12 days.

Q4: What about warranty and after-sales service?

We provide quality assurance under normal use conditions; specific details can be confirmed on a project basis.