Klean Kanteen Sippy Cups (12 oz)Product Rating: Product Review (submitted on June 30, 2010):
I loved these as sippy cups for my youngest! They use Avent spouts, so you can easily replace them or buy softer/harder spouts depending on the age of your baby. The stainless steel doesn't get gross after a while the way plastic sippy cups do, and the mouth is wide enough to put ice cubes in, which is great for summer.
All Klean Kanteen lids fit all the sizes of their bottles, so you can easily upgrade to a sports cap as your child grows, or put the sippy cup lid on a larger size if you like. All the members of my family have Klean Kanteen bottles, they're really fantastic and hold up to abuse much better than other metal water bottles we've tried. They will end up with a few dents and scratches, especially if you have a toddler prone to tossing and/or dropping things, which tends to look worse on the coloured bottles than the plain steel.
The one drawback is that the stainless steel means they're a little heavy, especially for a kid under a year. I would have liked something a little smaller/lighter when my son was younger.