They have a very clever design that I have not seen before. There is a flow position valve inside the cup. There are 3 adjustable flow rates plus a spill proof/off position. I have zero tolerance for leaking cups. They get one strike and they are out if they spill in my diaper bag. I’m also not a big fan of cups with lots of parts when it comes to cleaning them. I can barely keep up on my dishes, I don’t need to feel like an assembly worker. I’ve seen enough factory hours, I’m good for now. This cup is the perfect combination of function and style for my liking.
I should note, this cup is best used when supervised. If it’s not in the spill-proof/off position, liquids can escape from this cup. It’s great for Charlie when he’s in his highchair or sitting on my lap. It’s not my go-to cup for the car in case he chucks it out of my reach when we are driving. It will most certainly be a tumbler we can use for years to come. I love the zoo friends designs (cute boy and girl jungle scenes available) and the ergonomic spout is perfect for little mouths. The 10 oz. size is just right for toddler hands and the concave lid is designed to fit just right under little noses. Here’s my favorite part, they are only $2.99 each. I’ve spent much more on cups that I didn’t love. You can find the zoo designs at Winco, Meijer, and HEB in blue, pink, and green. Walmart has plain tumblers in pink, lavender, orange, and blue.