From the original dumpster design on thingyverse:

   Summary

   Here's a bin for your tiniest of treasures! It fits in the palm of your hand and will hold precious items. Decorate it with markers and prints to look like it lives on the street. The dumpster prints in several pieces all without support and needs a little glue to assemble. Simonkangiser.com (this is a dead link)

   Instructions

   Printing the dumpster is fairly straight forward.

   When you glue the casters in place, there is a flat side on the tapered peg that corresponds to a flat in the bottom of the bin. If you look at the model before printing, you will see what I mean. The casters will fit in the holes in any direction, but they sit the best if these flats are lined up.

   Each fork channel is printed flat and the 3 parts should be kept together as one piece. The plastic between the pieces is a hinge and allows you to easily fold them into the required shape. Fold it up and glue it in place on each side of the bin.

   The hinges part will slide down on top of the bin and stop on top of the corner guards. Put the lids in place and slide the bar through. I glued the bar in place with a drop of glue on the tab where it touches the corner of the bin. The bar can be swapped out for a piece of wire if you like.

   I included a photo of a version of the bins. Originally, I only made the lids and casters for the sculpture and made the rest of the body from metal. I decided it would be fun to make the complete dumpster to print.

   Enjoy:)