I liked the original idea of eveinhoffer and the 3D printable remix of thefear. However, the hole pattern in the coaster was not good for my pints and mugs. They were a little wobbly as there was small contact area in the middle. I took the dxf file from eveinhoffer's thing and modified it so that there are five same sized holes instead of four smaller and two larger holes. I scaled the coaster to suit my needs. As a bonus I made a lighter holder for the coasters. On the left in the image is the 96mm model and on the right the 119mm model.I used 10% or 15% infill and they turned out pretty okay. The coaster holder is not properly tested so please comment if you try to print it!