Foldable: Folding money is as high as a mineral water bottle, folded and as large as a burger for easy insertion into a backpack Material safety: It is made of food grade silicone material in contact with water. It is safe and has high temperature resistance. It can be used to make water durable and not easy to break Multi-function: Three intelligent modes, with the functions of boiling water, heat preservation and chlorine removal, can remove chlorine gas with one button and adjust temperature with one button Voltage adaptation: Supports 100V-240V voltage, intelligently adapts to different countries and can be used all over the world Easy to clean: The top cover is designed to separate and easily remove residual material