Frozen Ice Beer Glasses, Water Glasses, Double Wall Gel Cups with Frost Beer Glasses, Chilled Wine Glasses for Parties and Gifts, 450ml QUICK FREEZING - Double wall insulation filled with gel, the cup will keep your drinks cool quickly. Note: When freezing in the refrigerator, make sure there is no liquid in the cup and no water as much as possible. SAFE TO USE - Made of BPA-free acrylic material, the cup is safe for all beverages. We recommend placing the cup upside down in the refrigerator for 2-4 hours. The frozen gel is securely held between the double walls of the glass and does not come into contact with your drink. DO NOT TOUCH YOUR Beverage Directly - No contact with your drink, maintaining the original taste of your drink, providing an instant ice-cold effect. Usage: 1. Wash the empty cup, put it upside down in the refrigerator, and refrigerate it for 2-4 hours to freeze the interlayer into ice. 2. Take out the cup from the refrigerator and pour the beverage or beer you want to drink directly into the ice cup. 3. Wait for a while, the temperature of the beverage or beer in the ice cup gradually decreases, and the beverage can drop to about 5, which can last for 1-2 hours. Color: red Package includes: 1* Refrigeration cup