http://www.thingiverse.com/thing:16378 created by joo, and edited by me for a more watertight model.
Credit goes to joo for creating the original vase.

The original model had some problems with very thin walls at the corners causing leaks, this model fixes that, but is otherwise identical to joo's trivase.

1. Download
2. Print
3. ????
4. Profit!