Drinking cup stabilizer

A combination drinking cup coaster-stabilizer for placement upon a surface and for receiving the bottom portion of a drinking cup, said drinking cup having a cup circular floor portion and a cup conical wall extending upwardly and tapering outwardly from said cup circular floor portion at a cup draft angle from an axis normal to said cup circular floor portion, said coaster-stabilizer comprising;

• a base for placement upon a supporting surface, said base having a cup-receiving recess, said cup-receiving recess being defined by
• a base circular floor portion,
• a base conical interior side wall extending upwardly and tapering outwardly from said base circular floor portion at a base draft angle from an axis normal to said base circular floor portion less than said cup draft angle, and terminating at a circular mouth, said mouth defining an annular contacting ridge for continuous contact about the outer surface of the cup conical wall such that a residual space is formed between the cup and said base when the cup is placed into said base, and such that a partial vacuum may be formed in said residual space for maintaining the cup within said base.

A combination drinking cup coaster-stabilizer for attachment about the lower portion of a drinking cup and for placement upon a surface, said drinking cup having a cup circular floor portion and a cup conical wall extending upwardly and tapering outwardly from said cup circular floor portion, said coaster-stabilizer comprising:

• a base having a recess configured for accepting the lower portion of said upright drinking cup and maintaining said cup in an upright position, said recess defining a mouth positioned to maintain continuous sealing contact about the outer surface of said cup and being shaped such that an annular residual space beginning adjacent to said mouth and being partially defined by said cup conical wall is formed between said base and said cup, and a partial vacuum is formed in said residual space for maintaining said cup with said base, said mouth being the only point of contact between the base and the cup.