Too many dirty glasses solution

I made the coaster on the right last year for teacher/neighbor gifts. I just found a Christmas stamp and used a permanent ink pad. I put on a good coat of polyurethane. My youngest's teacher like them so much, so requested some non-holiday ones for everyday use. I whipped up some with her initials out of vinyl. Since they were such a success and we've moved cross-country, I made some more this Christmas.  They are super quick and cheap -each tile only costs about $.30.  So much better than coffe mugs and lotions (trust me every elementary school teacher in America has a cupboard full of mugs and baskets full of lotions).

This is what my kitchen looks like on a regular basis. No we did not have a party and there are only 5 people in my family. All the dirty glasses drive me crazy-especially since most only held water. I've tried assigning everyone a color-coded glass or writing names on each glass, but it didn't work. I decided to make each member of our family a coaster (and a few extra for guests) and then institute corporal punishment for anyone that doesn't put their glass on the assigned coaster.

I bought these tiles at Lowe's for about .30 a piece. You can use those felt furniture protecting pads, but I was out. Instead, I used a hole punch, some craft foam, and craft glue to make my own

I was going to do initials, but thought symbols would be more fun. I used these 2 cartridges

Then I stuck the vinyl on each coaster and sprayed them w/ a quick coat of polyurethane. Easy Peasy.

Guess which one is mine?