100 Goods Set of 4 Contemporary Silicone Coasters Stackable Round (90 X 90 X 6 mm) (Transparent)

They have texture on the bottom so that clear epoxy resin will be cloudy/foggy on the back. I have to pour epoxy on them upside down a second time to get them clear.

Like these very much! They’re small but hold a regular sized mug, heat resistant, light and flexible. They won’t slide or scratch your tabletop.

Tried to use this for resin molds... they are matte.