Patent ID: 7770748

Claim:
A tumbler with convertible lid and coaster device comprising: a tumbler comprising: a brim, the brim defining an open end of the tumbler; an exterior side wall comprising a bottom portion opposite the brim, the bottom portion comprising a plurality of internally recessing tumbler grooves; and an interior side wall comprising a plurality of tumbler lugs extending inward therefrom; and a convertible lid and coaster comprising: a top surface, the top surface further comprising a finger recess; and a securable straw hole through the convertible lid and coaster; a skirt extending down from the top surface to a bottom edge and comprising an external surface comprising a plurality of angled coaster grooves extending upward from the bottom edge, and the skirt comprising an internal surface comprising a plurality of coaster lugs extending inward from the internal surface nearer the bottom edge than the top surface; wherein the plurality of tumbler lugs engage the plurality of coaster grooves when the convertible lid and coaster is threaded into the open end of the tumbler, and the plurality of coaster lugs engage the plurality of tumbler grooves when the convertible lid and coaster is threaded onto the bottom portion of the tumbler.