Patent ID: 8336731

Claim:
A cup comprising: an open top, cup walls and a closed bottom having an anti-rotational pattern protruding downwardly from a generally flat bottom surface, wherein said anti-rotational pattern comprises a plurality of downwardly protruding vanes of substantially triangular cross-section each extending outwardly from a center portion of said bottom and each having two downwardly pointing vane walls forming an angle of approximately 45 degrees or less which are joined at a ridge wherein one of said vane walls is substantially vertical and the ridges of no two vanes are separated by 180 degrees, and further comprising a cupholder having a pair of cupholder fins that are positioned 180 degrees apart from one another such that, if said anti-rotational pattern is placed against one of said pair of cupholder fins, said cup will be inhibited from rotating within said cupholder.