koosie

A koosie, also known as a koozie or can cooler, is a sleeve made of fabric or foam designed to thermally insulate a beverage container, typically a can or bottle. Its primary purpose is to keep the drink cold and prevent condensation from forming on the outside of the container, which can make it slippery and leave rings on surfaces. Koosies are often made from neoprene, fabric, or foam, and come in a wide variety of colors and designs. They are popular for use at outdoor events, parties, sporting events, and during casual gatherings. Many companies and organizations use custom-printed koosies as promotional items or merchandise. The concept originated in the United States in the late 1980s, and the term "koosie" was trademarked by a company in Texas. Variations exist, including those designed for specific bottle sizes or stemmed glasses. The insulation provided by a koosie helps to slow down the rate at which a beverage warms up, extending the enjoyment of a cold drink, especially in warm weather. They are also useful for protecting hands from the coldness of the container.