【FDA-approved Material】Made of FDA-approved and 100% BPA-free food grade silicone to ensure safe drinking without odor or stinky taste. It can be safely used for hot liquids up to 392°F (200°C) and liquids cooled to -58°F (-50°C). Note: we do not recommend using it for liquid above 140°F (60°C) to avoid burning your hand while holding it.

【Collapsible Body+ Carabiner】Kupton portable travel water bottle can reserve 500ml liquid with only 210g in weight. It can be folded from 9.8 inch to 5.9 inch in height. Collapsible design allows you to save almost 50% space, makes it more portable and easier to storage. Carabiner is provided for easy carrying, which can be hung in backpacks or belt when hiking or running.

【Leak-proof Design】Unique double-locking ring design to prevent the bottle from accidentally opening; Durable silicone gasket inside the cap to ensure tight seal and prevent leakage; One-button switch to help you open and close the cap easily and quickly.

【Ideal for Travel】This foldable drinking bottle is light in weight but high in strength. It can stand stably whether filling liquid or not, not easy to tilt. Unlike easily broken glass bottles, its soft silicone body resists daily drops, bumps and scratches, makes sure you stay hydrated during your trip or sport activity.

【BONUS! Quick Dry Towel Included】Provided towel is ultra-lightweight, soft and fast drying. Small (40cm x 40cm) but with excellent water absorption! Easy to put it in your pocket when you are traveling, hiking, exercising or camping trip!