What brand is yy mug?

YY is a domestic home lifestyle brand, focusing on the design and production of children's cups, which is deeply loved by consumers for its high quality and high value.

A thermos cup is generally a water container and a vacuum layer made of ceramics or stainless steel. The lid of the thermos cup is tightly covered. Vacuum insulation layer can delay the heat dissipation of water and other liquids in it, thus achieving the purpose of insulation.