About this item 304 Stainless Medical Grade Steel----Insulated Water Bottle greatly outperforms 18/8 food grade stainless steel in anti-oxidation and corrosion resistance, it will never leave a metal taste or rust. Avoid the taste of the liquids to change (like tea, coffee and juice). Anti-scald design----Touching the lid of the cup lightly to display the current water temperature. Long Time for Holding Temperature ----Featured dual walls, premium coated copper on the exterior of the inner wall. High performance temperature retention, keep liquid hot up to 24 hrs and cold up to 24 hrs. 100% Leak Proof & Easy to Clean----The BPA-free silicone rubber on each lid ensures no leak, no plastic smell. A cup brush for easy washing. Insulated Water Bottle is perfectly suitable for daily use, running, hiking, camping, etc. Warm Tips Warm display cover does not wear batteries Color Card

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