COJOY [Ultimately Convenient] Collapsible Water Tank Water Container Water Carrier- Emergency Water Bag, Food Grade 5 litre water carrier, large capacity leak free , good for camping ,hiking ,BBQ etc out door activities Space Saver: Collapsible, fordable potable lightweight design for efficient packing Food Grade- BPA FREE , its very safe and clean , you can reusable, and easy to wash it. To compare other bottle the one more lightweight ,save space and with large capacity. The more important is the material with a layer aluminum foil , it can keeps away sunlight direct burn inner liquid Wide bottle lip easy for transfer wine or water to the collapsible wine bottle, The portable bottle perfect for concerts, travel, camping, hiking and other outdoor activities, at the same time specially design for kids to bring water.