This cheap and readily available object makes a great stand for small half-body puppets. James, over at CMMonthly.com has found that the plungers keep the puppets upright and clean.
I can imagine that they would be ideal, not only in a store room situation, but also on a table behind the staging, during a performance. It will be much easier to spot and lift the right puppet at the right time with them standing in a row.
And just think of the satisfying **Schlurp** sound when you detach them after the show!