I originally made ten copies of this coaster with some lettering honoring the Welsh Highland Railway's annual Rail-Ale beer fest. I then removed the lettering and added four feet to keep the coaster up off whatever surface it was resting on.

The model consists of a main body, a cut-out of a Welsh dragon, and a colored insert, preferably red, that goes between the body and the dragon cut-out. The Welsh flag colors are green and white with a red dragon so the best colors for this coaster are a white body, red insert, and green dragon cut-out, or a green body, red insert, and white dragon cut-out.

The photos show the two color variations as created on my Ender 3 Pro.