Although I've had a couple of adventures in coaster making before, some more successful than others, I wanted to try something new (only partly because I wasn't thrilled with my last attempts). So, I went to Home Depot and bought four 4"x 4" white ceramic tiles for 13 cents a piece. Then, I went to JoAnns and bought a sheet of sticky back felt for a whopping $1.09.
Back home, I pulled out a roll of blue masking tape and cut it (this is a great task for phone calls with your parents, by the way) in to chevrons. I got lazy half way through so I made some with stripes instead.
To keep the bottoms from scratching the finish off my table. I cut 16 small (1 cm) squares out of the sticky back felt and placed one on each corner of the tiles. With a 9 x 12 sheet of felt, I could have made enough of these for everyone I know.