Half-gallon plastic jars (UWS 94/Columbus)

There are eight. Dimensions 5" x 5-1/2" x 7-1/2" high. They stack, but don't nest, so any pile will be unstable. Screw-on tops make a very good seal. Useful for food, hardware, you name it. You don't have to take all eight, but you must take at least two.