Abstract: A spill-proof auxiliary top for a conventional metallic beverage container comprises a unitary molded piece of resilient material that includes a base and a pedestal-like mouthpiece. The mouthpiece is of generally-arcuate shape to conform closely to a consumer's lips. A skirt extends from the base to encircle the can. Tapered sections of the interior of the skirt are arranged for interlocking the upstanding ridge conventionally formed at the top of a beverage can to thereby maintain a secure relationship between the auxiliary top and the can through otherwise-critical tipping angles.