I used arsenic labels that I printed off Graphics Fairy for the front of the cups, the skull and crossbones fit perfectly with the skeletons. (Check my side bar for a link to Graphics Fairy!)
On the left is a close up of one cup and on the right, we see a cup filled and taking its position in the place setting of my witches party. I will post soon with more details about the party. Its was a lot of spooky fun, in fact my four year old granddaughter said "Grandma, this is the BEST witches party EVER!"