A dome that can be used to make a small green house, which can be placed on top of flower pots to help plants sprout.

After printing, simply cover the dome in kitchen wrap/plastic foil, and hold it in place with a rubber band placed in the groove in the base.

I've added the model in a couple of sizes. It's best to scale it up if another size is needed to make sure that the pillars don't become too thin.