I wanted to create a tray that could hold board game bits, allow them to be passed around between players, and has a funnel to make it easy to put them back into their baggies at the end of the game.
This model was optimized for 0.4mm nozzle with 2 shells and requires no supports.
UPDATE 10/4/2017: My daughter recommended putting a "neck" on the funnel to assist in getting parts into the baggies. So I created a version 2 that does improve "pouring" performance.
Monoprice Maker Select V2.1
I recommend printing at 0.28mm because many 3D printers have z-axis stepper resolution of 0.04mm. They can do other heights with the use of microsteps, but the stepper motor will be fighting to hold that position. If you select layer heights that is a multiple of the full step size (0.04mm), then you will get better quality and much better layer-to-layer adhesion.