Simple Cup Holder

My wife has this crazy Mahjong table and she wanted some cup holders for it. At first I thought she wanted something attached to the side of the table and told her I wasn't going to drill holes in it, and coming up with something to clip on to the crazy shape of this thing would be too much of a pain. Just go buy a table to set next to it!

She said no, just wanted something to keep the felt from getting wet, like a coaster, but also with a bit of tip over protection. So I came up with this.

It's just a flat base with a round spot to hold a cup. But it does what she wanted. Figured I would upload in case someone else wants something simple.