No... not transvestites... TRANSMISSIONS...
Costco has these ToughBoxes for $8.99 each. They are 27 gallon size and fit a 901 transmission perfect.
Note: Walmart has them too, but they are about $12 to $13 each (if I recall).
When I shipped my transmission to Dr. Evil, I actually bought TWO of them and double stacked them.
Lined the bottom with layers of cardboard. Placed the tranny on top and then filled in the gaps with more folded cardboard to minimize shifting.
Snapped on both lids. THere are already some holes around the long sides. I drilled some extra holes around the short sides through the lips on the bottom and zip tied the boxes and lids closed.
Nice and durable and cradles the tranny pretty nicely!