Lots of packaging takes the form of a truncated cone, otherwise known as a conical frustum.
Just as a regular “frusta” or “frustrums” (otherwise known as a trapezoidal boxes) can be efficiently packed together in alternating right side-up / upside-down arrangements, so too can truncated cones.
2. This cone packing arrangement figured into Ingemar Ohlsson’s 1993 patents for a “Container” and a “Distribution Unit of Packages”
Three more examples, after the fold…
4. This preliminary study for Karl Daubmann & John Marshall’s 2009 “Shadow Pavilion” also relied on truncated cone packing
5. a 1959 patent by E.J. Towns for a 12-pack of suppositories employed the same packing arrangement
6. “continuously variable transmission” (or “CVT”) also takes advantage of adjacent alternating truncated cone geometry