This is a vase I made for my orchid which was neglected far too long. I thought up the idea of making the vase look like leaves at the base of a flower. For an orchid, you don't want it told hold any water. You want to just water it once a week or so and let all the water drain out, so this vase isn't water tight. I put it in the sink and put water in it, then just leave it for an hour or so to drain before putting it back on the table.

I printed it in white ABS. Note that the bottom isn't exactly flat, so you may want to lower it slightly beneath the build surface in your slicer program to make sure the base is flat.