The GOsili Siliskin Universal Sippy Top turns any regular cup or glass into a spill proof sippy cup! It just stretches over the top and grips the cup tightly, sealing it and making an instant no spill cup.
Siliskin Sippy Tops are made of 100% silicone which does not contain toxic chemicals like bisphenol-A (BPA), lead, PVC and phthalates! Silicone also does not transmit unpleasant flavors, promote bacteria or fungus growth and is hypo-allergenic.
These sippy cup tops are dishwasher and microwave safe, too. This also includes the 8 oz silicone cup.
The attached video explains just how to use the Siliskin Sippy Top.