[SUPERIOR MATERIAL] - This collapsible bottle is made of food-grade silicone, which can be sterilised at high temperature, has no odour and is comfortable to touch. It is not recommended to use liquids that are hotter than 60C to avoid burning your hands.Please note: the product cannot be folded when filled with water, please check carefully that the lid is tight before putting it in your backpack. [COLLAPSIBLE DESIGN] - The 500ml foldable silicone water bottle is only 13.5cm when fully collapsed and 23.5cm when unfolded, making it lightweight and portable so you can take it with you when travelling. [LEAK-PROOF & EASY TO CLEAN] - The foldable water bottles for travel is designed with a silicone seal to prevent leaks. We have also included a cup brush to make cleaning easier. When first used, it is recommended to soak it in boiling water for 20 minutes to clean it thoroughly. [FUNCTIONAL EXCELLENCE] - Travel collapsible water bottles with hook to hang on the bag attached to the carrying strap and portable hook. Easy to store and use in a variety of scenarios. When space is tight, the retractable drinking cup can be folded up for easy carrying anywhere. [PERFECT FOR CARRYING] - Silicone foldable water bottles 500ml, easy to carry, compact and stylish, folding storage, can be put into the bag, suitable for carrying, can replace disposable water cups, one-handed grip, easy to carry - suitable for running, fitness, sports, camping, outdoor activities, but also perfect for airport travelling