a blank of cardboard or plastics , the blank comprising a transverse fold line dividing the blank into a bearing portion and a support portion , the bearing portion having an aperture to accommodate the neck of a bottle or wall of a drinking glass or cup , the support portion being foldable under the bearing portion and terminating in at least one leg which is foldable relative to the support portion and arranged to co - operate with an underside of the bearing portion and to bear against a side of the neck or wall of the bottle or glass whereby the bearing portion is supported to extend laterally from the bottle or glass .