Patent ID: 8807368

Claim:
A series of vessels comprising: a first vessel including: a first bottom wall, and a first coupling feature formed on a bottom surface of the first bottom wall; a second vessel sized larger than the first vessel and including: a second bottom wall, a second coupling feature formed on a top surface of the second bottom wall and configured to engage with the first coupling feature of the first vessel to form a first mated pair selectively mating the first vessel with the second vessel, and a third coupling feature formed on a bottom surface of the second bottom wall; and a third vessel sized larger than the second vessel and including: a third bottom wall, a fourth coupling feature formed on a top surface of the third bottom wall and configured to engage with the third coupling feature of the second vessel to form a second mated pair selectively mating the second vessel with the third vessel, and a fifth coupling feature formed on the top surface of the third bottom wall and configured to selectively engage with the first coupling feature of the first vessel to form a third mated pair selectively mating the first vessel with the third vessel, wherein the series of vessels only forms one of the second mated pair and the third mated pair at any one time; wherein: the first coupling feature and the third coupling feature are each defined by a flange extending downwardly from the first bottom wall and the second bottom wall, respectively, the second coupling feature is defined by a rim extending upwardly from the second bottom wall, and the fourth coupling feature and the fifth coupling feature are each defined by a rim extending upwardly from the third bottom wall.