Klean Kanteen 12 oz Stainless Steel Sippy Review

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(More customer reviews)I have always loved the idea of the Avent system, because of the interchangeable sippy spouts. My kid is a biter; the spouts of his sippy cups invariably get badly scratched up and therefore need to be replaced. With most sippies this means replacing the whole cup, which gets expensive! The Avent system eliminates this problem; however, their sippy cups leak like mad (the lids unscrew WAY too easily) and the bottles are made from nasty leaching plastic. The Via system is #5 plastic but too clunky and cumbersome to use as a sippy.
The Klean Kanteen is the perfect solution: safe stainless steel and the convenience of interchangeable Avent sippy spouts. I was beyond thrilled when I learned that it existed.
The adapter cap has two pieces: the part that screws into the bottle, and then a piece that is EXACTLY like the white screw ring from an Avent bottle (except that it's black, of course, and just a little bit bigger). This means three things:
1. ANY Avent sippy spout or nipple will fit in it. Both the white and the green spouts are meant for babies first learning to use a sippy cup; this is probably why many toddlers get frustrated trying to drink from the spout that comes with this bottle. There is a "toddler" spout available that is much easier to drink from.
2. It will leak if you over-tighten it. DON'T screw it as tight as it will go or it will leak.
3. The Avent dome caps fit. (I am surprised that nobody seems to have noticed this before!)
(It seems like the Avent handles should fit, but they don't, or at least I can't seem to get them on quite right - they cause pretty excessive leaking. It's a shame because that would make this cup absolutely perfect for younger toddlers. For my 2-year-old, though, it's just fine without handles.)
I plan on getting a neoprene cover for it to keep the contents cold (and because my son saw the one I have on MY Klean Kanteen and wants one for himself!) but other than that, this sippy is pretty much perfect. I love it!

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