Abstract: An insulating device for a beverage container including a flexible insulating sleeve for receiving a beverage container therein. A cover is provided for covering the top opening of the insulating device. A strap is provided to cover the bottom of the insulating device whereby the beverage container cannot pass through the insulating device. The cover is provided with two fastening devices whereby the cover may be secured over the beverage container or may be looped around to form a handle for the insulating device. A belt loop is also provided on the insulating device whereby the entire device may be secured to a belt.