Transitional Toddler Cup Spouts: Turn any of your toddler's favorite kids' cups into sippy cups with these colorful and stretchy Snug silicone sippy cup lids Durable Silicone Sippy Cups: These silicone sippy cup lids are stretchy enough to fit over most cup sizes with a 2.5 inch to 3.75 inch diameter to make their favorite toddler cups easy to take on the go Spill Proof Kids Cup: The Snug sippy cup lids keep their favorite beverages in the cup and off of your kids with a tight fit that helps prevent leaks Safety of Silicone: Rest easy knowing these drink lids use a 100% beverage-safe silicone material that is made to last and brings a pop of fun color into your day Dishwasher Safe: All pieces are top rack dishwasher safe for an easy clean that'll help you keep these toddler sippy cup lids ready for the next day