These are my favorite: Elite Custom. I tried the Tacx and didn't like them. One of the ones I ordered was bent...which said to me that a fall could destroy them, since there was no way to get the bottle in unless they are perfectly round.

Those Elite Custom ones are awesome. I have yet to have an issue getting a bottle in the cage. Prior to those I had those cheapy wire kind...total nightmare. I was forever dropping bottles.

My favorite bottles are the Camelbak Podium bottles.