We looked at the top 10 sippy cups and dug through the reviews from 35 of the most popular review sites including Toodrie, Healthline, Heavy, Your Best Digs, BestReviews, Best Mom Products, My Babies Planet, Lovie Life, Lille Nord, Mom Junction, BoosterWP Reviews, Best Reviews Guide, A Best Pro, Born Cute, Verywell Family, Romper, Experienced Mommy, Twiniversity, Mom Loves Best, Wiki EZ Vid and more. The result is a ranking of the best sippy cups.