I have a pair on my Rivendell Clem. They are very good and I find them excellent especially for riding fire trails etc. They do hold on well. No experience using Kleen Kanteen bottles with them. I've used a few typical plastic bottles with it and not really noticed a problem with any. I have lots a Nalgene bottles but none sized for a bike cage, so haven't tried that. Here it is I believe with a Polar solid color insulated bottle, and a SOMA crystal polypropylene bottle. The SOMA bottles are a bit slippery and tend to fly out of my Nitto cages off road. No problem with the King cages.

Yeah, it's not exactly a glamorous or detailed photo. You can zoom in. My bike was taking a nap at the top of the hill.



I made it to the top