This is an accessory for the Spinning base available from https://foreverspin.com/

I was a backer and I love my top and base, but the one thing I didn't like was my top getting loose and rolling off. So I made this.

I was able to make it in Tinkercad and with the help of my digital caliper. This is my very first thing I designed from concept in my head, measuring with the caliper, and printing with my Monoprice Select Mini

The result is insanely precise. I had to push with some force to get the spinning base into the cup, but it works like a charm. My top doesn't go skittering off when it finally falls over. I love it. I should have been a little bit more forgiving in my measurements because the base fits in not just perfectly, but permanently.

So this is a !!!!WARNING!!!!

If you put your spinning base into this cup, you're not going to be able to get it out unless you resize or you break the cup to get it out.