After being tortured by seeing all the "diy plates" with sharpies, I feel honor bound to post that you really should be using a Pebeo Porcelaine 150 pen. Seriously, this is what we use and sell at work-- don't use sharpies people!
They're dollar store vases the inside lined w/ scrap book paper then embellished. Fill with your choice of filling (flowers,tissue paper, candy) u can even put a picture in between the paper & glass to personalize them a little more - pen/pencil holder?
DIY Custom Monogram Coasters:L 4 x 4 white tiles (from Lowe’s or Home Depot), computer paper monogram, mod podge, cork board, acrylic sealer, glue gun, sponge brush. Easy! Could make a nice gift for friend, new neighbor, or coworker.