Contigo Kids Stainless Steel Water Bottle with Redesigned AUTOSPOUT Straw Lid Eggplant and Punch, 13 fl oz.

This is the best kids' bottle in the world. Yes, a child might chew through the straw, and yes, the handle can come off—but that's not what matters most. What really matters is that the water does NOT leak from this bottle. I've tried many bottles from different brands, but this is the only one that truly doesn't spill. I have twin boys, so I own a whole collection of these bottles in different colors and styles—and I don't regret falling in love with this brand at all.

It's a bit pricey but it's cut down how much milk I throw out because it doesn't go bad in this cup, not for maybe 10-12 hours. It's easy to clean- I use a bottle brush and a straw cleaning brush. My little one has been using these cups since she was 10 months or so and she's very petite, so it's easy to hold and easy for her to open using the button. I see these lasting for years so I think the price is worth it.