Product Description

The frosty mug have double walls, it is made from Acrylic or PS (sterile &innocuous material), the interlayer material is some special-purpose gel which the expansion coefficient is small, after frozen it does not lead to vessel broken, so the mug is safe & non-toxic.

First, keep the cup in the refrigerator and let upside down before being put into use, after **4 hours, it could be OK for use, and your favor drink. It can be cooled down to or so -5 degrees Celsius in a torrid summer, the drink can be keep about 2.5 hours in that sustained refrigeration condition, it will not loss the original color, quality, taste and purity.