Let's see...27grm CF cage that cost $60 for a Zipp CF, lightest one I could find; or oh, a TI King cage at 28grms for the same cost; or a King Stainless at 48grms for $18.......hmmmmmmmmmm, you have two cages thus cf vs stainless weight is 42grms favor of CF, and the cost difference is $84 favor of Stainless for just a hair less then 1 1/2 ounces which weighs as much as 11 one dollar bills. OR you can get a Ravx Arrow X cage made of plastic (for those who must have the CF look) for $6 that only weighs 38grms.

Personally, I don't fret over weight, and I don't like the look of plastic or CF cages, so I stay with Stainless, they last a very long time and hold my 24oz bottles tight without leaving marks on the bottles.