How to design and make an 100% water-resistant bag?

We need to design the package structure and the materials to be used. Generally require some special seals and materials.
Sometimes we need to use the function bag, this one is completely waterproof for exmple which we made before, the bag is even airtight. Useful outdoor water-resistant Dry bag for travelling, boating, feeding animal water bag, snowboarding bag. The material is generally TPU or PVC,It can carry weight stuff, and completely sealed.

The black TPU BAG The black TPU BAG

An bag in tpu mateiral An bag in tpu mateiral

Take a look at the design of the pocket, this is the perfect feature of the bag.

water-resistant bag

water-resistant bag

This is the normal seal for this kinds of water bag, i can carry water, but can’t 100% sealed.

an waterproof bag with printing design

an waterproof bag with printing design