The freezer jar adopts a double-layer design.The outer wall of the freeze cup is silicone, and the inner wall is 304 stainless steel, and includes a plastic lid. Remove the bottom sealing plug, pour water from the bottom water inlet, turn it over and place it in the refrigerator to freeze, allowing the freezer cup to continue to cool without adding ice. Double wall vacuum insulation technology keeps your drinks cold for up to 6 hours, providing you with a comfortable drinking experience. Suitable for party use such as Christmas, Halloween, birthdays, graduation, weddings, or daily use, and it is also an ideal gift for friends, family, classmates and colleagues.