Sister has never really been one to drink from a sippy cup. One day it dawned on me that it would be fun to let her drink from punch cups. I have a BUNCH of these (I think my mom found at a garage sale for about a quarter a piece.) They have a wide base, so they don't tip easily - and they don't hold too much liquid in the event the cup is spilled. By the way, she hasn't spilled too much milk.