We've had several comments in feedback that people love our coasters but there isn't an anti-slip material on the back. This is a very good point, but the reason for it is that our coasters aren't just designed to BE coasters; they're also able to be used as plaques, door signs, decorations and generally for any other use you want to put them to. They're also able to be upgraded with 3mm x 5mm neodymium magnets (available elsewhere in my store) so they can be used as magnetic signs or fridge magnets, and if there was coating on the back of the coaster it would mean the magnets would be further away from the surface they're trying to stick to and the coaster won't stay in place. However, never let it be said that we don't listen to our customers!
We're adding to the store today a set of four clear rubber feet with an adhesive backing, which can be stuck to the back of a coaster and will act as the anti-slip surface which people are asking for. These are available as a single pack of four and a multi-pack of sixteen, suitable for coaster packs or for larger orders. These can, of course, also be used with our other designs to make sure they also will be less likely to move around!
The feet you receive may be slightly different from the ones pictured, but all will be transparent, approximately the same size and with the same adhesive backing.