SAFEST AND Best possible MATERIAL: The inner wall is composed of 304-grade food-grade stainless steel, while the exterior casing is constructed of 204-grade stainless steel. The FDA has cleared it for your drinking requirements. Of course, BPA is not present in 100 percent. LED DISPLAY IS WATERPROOF: Waterproof LED display that can be immersed totally in water. Simply touch the LED screen, and the temperature of the liquid will be shown. You do not need to test the temperature with your mouth or risk getting burned. DURABLE KEEP HEAT COLD: The vacuum created by cups and cups helps prevent heat transfer.
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