Crazy patterned vase design I came up with using a secret technique I came up with.

Both files give a solid block. I've included a STEP file if you want to carve out the inside or modify it at all.

Both models are solid. I printed it using Slic3r vase mode with 0% infill and 0 top layers. For other set ups I'd suggest printing it hollow and stopping before it tries to put a top on it.