Tired of buying sippy cups. or maybe forgetting them at home when you go out? You may want to check out this deal on this 6 Pack of O-Sip! Silicone Sippy Lids, on sale for just $14.99 (Reg. $39.99) + FREE Shipping right now! These spill-proof drink lids fit over virtually any cup or glass. Simply stretch the lid over the top of one and voila—a spill-proof sippy cup! Perfect for the little “Butterfingers” in your family.