Review on 🥤 EZTOTZ Tough To Tip BPA Free Plastic Baby Cups - Made in USA | Open Top Cups for Kids - Tip Resistant Kid's Tumbler Cup for Independent Toddler Learning - 12+ Months | Safe & Non-Toxic by Yiorgos Reynolds

I like that the edges are all very smooth, the ridges provide for good gripping and the weighted bottom and shape make it, as the name says, tough to tip. I bought this for my 20 month old grandson. He typically uses a sippy cup. During the first use he caught on to raising an open top cup, tipping it to feel the liquid on his lip, and was properly drinking! His reaction was one of delightful pride! I'm keeping one for my house and the other is going in his Christmas stocking.