・ I received this as a gift, but I'm selling it because I don't have a chance to use it. Keeps beer and carbonated water refreshingly cold, even on hot days. This stainless steel koozie uses vacuum insulation for both hot and cold beverages. If you put an ice-cold canned beer in this koozie, you can enjoy delicious beer until the very last drop. The gasket at the top to secure the can can be easily attached with just a 1/4 turn. Dishwasher safe.