A beverage insulator as described herein may comprise a generally hollow body having an interior space, wherein the interior space is adaptable to receive at least a portion of a beverage container, and a compartment disposed exteriorly of and in fluid communication with the interior space. The interior space and the compartment may be in fluid communication with each other via a valve or other suitable conduit. The interior space may be sized and shaped complementary to a beverage container such that when the beverage container is inserted into the interior space, the compartment is inflated with air or other fluid. Alternatively, a valve may be configured to receive a tube through which a user may blow air or other fluid in order to inflate the compartment. The inflated compartment insulates the beverage container and its contents.