You don’t have to sacrifice style to keep track of drinks with these fun chalkboard glasses.  They’re perfect for a casual dinner party or wine and cheese get-together.  Leave white chalk on the bar in a silver mint julep cup or juice glass to dress up the sidewalk staple.  Unlike other chalkboard cups, these glasses are reusable.  Simply erase names while washing glasses and reuse until your heart’s content.  These babies are dishwasher safe, though I hand wash them or use the china setting on my dishwasher to prevent the chalkboard area from wearing away.   
Available at Wold Market, $16/ set of 4 glasses
http://www.worldmarket.com/product/index.jsp?productId=3596187