This cute vacuum insulated cup is made of food-grade stainless steel inside and outside, no metal taste and won't retain or transfer flavors. Our double-wall vacuum insulation technology keeps your beverages hot or cold until the last sip no matter what the climate outside, and the cup's surface will be always in a comfortable temperature whether it is hot or cold drink inside. The wide mouth accommodates full-size ice cubes. The durable paint coating matte finish means your tumbler is held easily and fingerprint-free, also won't fade, peel or crack through extended use, so you can take this tumbler to anywhere.