2021 White Black Edition
I have a large mug for coffee and water, but my wife likes to drink Coke Zero from cans. I made this insert to hold a standard beverage can so it wouldn't flop around. I thought I might need an o-ring around the perimeter to hold it in place, but it fits perfect without one. If you want to make one for yourself, the OD is 96.5mm and the ID is 67mm. It's 15mm thick.