SKOFRI Glass Tumbler Milk Cup with Silicone Straw and Lid Handle for Kids & Adult Heavy Glass Cup 370 ml Water Mug with Scale Juice and Drinking Mug for Kids(2 pcs)

The only negative point I found is, it becomes really heavy for my 4yr old to hold the cup once filled. Else it's a really good purchase. Its completely spill proof and the straw makes it even more easy for kids to finish up their drink.For mommies, the sipper has markings so with this you can keep a track of the quantity the child is taking in.