We love our Klean Kanteens too! My boys each have the 12oz with a sippy spout, and I have the sports caps & loops for when they are out of the sippy stage.
DS1 who is 2.5 has thrown his many times on cement, it has quite a few dings but still works great. We have the plain stainless finish they look ok still
I did try the safe sippy and it lasted a few weeks before the metal cracked somehow?!
SAHM, wife to K
and lucky mama to 2 boys! DS1 6.2010, DS2 4.2012
Living the simple life and loving it!