Don't Let Snacks Attack. Snacks just might be the best invention eve-—until an exuberant toddler flings a humongous container of them skyward. But thanks to Snug Snack it will never rain goldfish again. These handy dandy silicone lids turn cups into spill-proof snack fortresses. Snug Snack comes with two stackable containers and fit cups with a 3.25-4 inch diameter. More munch, less mess.