Perfect SizeThe revolutionary lightweight design is stylish. This thermos flask weighs only 180g, it is very convenient to carry, it can be easily put in a pocket, purse, handbag or lunch box.You will do not need to use a one-time cup or another person's cup, which can protect the environment and prevent cross infection. Vacuum Insulated Water BottleDouble wall insulation maintains temperatures inside regardless of the temperature outside, drinks stay hot up to 6 hours or cold up to 12 hours. Fantastic for milk, coffee, tea, soup, fizzy fruit juice or protein shakes and iced cold water. Sealed and Leak ProofAn airtight seal eliminates accidental spills and maintains a leak-proof drinking bottle, 100% leak proof even when stored or carried horizontally. Its double-walled construction eliminates condensation and water build-up so taking these travel bottles on the go is easy and mess free. Food Grade StainlessFormed from quality rust-resistant 304 food grade stainless steel inside and out, maintaining the taste and purity of your favourite drinks. BPA-free, phthalate-free, and toxin-free makes these reusable water bottles a healthy choice.