I needed an upgrade for my cheap beach umbrella after it kept blowing away. Decided to model and print a sand anchor that can be secured to the umbrella pole using a couple bolts. I tapped the holes on the top of the anchor for the bolts and printed at 100% infill. I may modify the design after testing a little more on the beach. Enjoy the shade!
Version 1 was printed with no support material. V3 should not require any either.