Flower Planter or Beer Torpedo!

Short version: This is a planter. It looks like it would look nice with a flower in it.

Long version: So my friend and I were floating in the pool, with no convenient place to rest our beer. Afterwards we got cracking on the issue. Unfortunately alcohol does not lend itself well to design work and our measurements were all wrong. So our object couldn't hold beer cans. We field tested (pool tested?) it with a beer bottle and we found it shot to the bottom even faster; apparently the cones