Our multi-functional thermos tumbler adopts double-layer vacuum insulation, which can keep your beverages warm for up to 3 hours or refrigerated for up to 9 hours.
The multifunctional bulk wine tumbler is made of food grade stainless steel with non-slip frosted coating，no metallic taste. It is equipped with a BPA-free lid .
If you have enough storage of stainless steel water cups in your home, the extra stainless steel tumblers can also be taken to the office, school， or used as gifts for relatives, friends, colleagues, classmates, and teachers.
