As well as glass beads, I've started to dabble in fused glass. You can see here some examples of fused glass coasters. These make a lovely gift.

Coasters are approx 10cm x 10cm with rounded edges, and have "bumps" or "feet" in the corners for added stability. These are thick, chunky, solid coasters! They can be bought singly or in sets of 2 or 4. Prices from around £8 per coaster.