A Tupperware set can be purchased in any number of groupings. They are grouped into sets of the same sized and shaped containers. However, they are instead sometimes grouped in a variety of shapes and sizes to give you options.
The set could be based on their unique purpose, such as a freezer set or based on their appearance, giving you a set of storage containers that have similar design elements.
For example, the Wonderlier Set gives you three bowls with tops that fit snugly holding both liquids and solids. The set includes a 6 cup with lid, an 8 cup with lid and a 12 cup with lid. When storing these bowls, the smaller ones and their lids fit comfortably inside the larger bowls. This makes for very compact storage in your cabinets. They come in three colors: lavender, teal, and sunflower yellow.