I made these coasters using a ceramic tile and a napkin. I tell how in this previous post.
They were actually my daughter's homemade gifts to her mother-in-law and sister-in-law, but she was having trouble finding time to get them done. So we made a trade and I ended up doing them for her!!
I usually pick up the tiles at Lowes and I find my most unique napkins at Tuesday Morning.
These are a very inexpensive gift and they take very little time to make.