Abstract: The present invention is a bottle holster. The bottle holster consists of an insulated cylindrical body with a closed bottom and a tapered open top. A zipper opens and closes the insulated cylindrical body. The bottle holster attaches to the user by hanging from the user's belt horizontally. Alternatively, the bottle holster can hang vertically from the user's belt and be secured around the user's thigh. The bottle holster is superior to prior art in that it allows access to pockets and compartments contained upon a wearer's belt or utility belt through its holster position and loose horizontal configuration.