The
Performance stainless steel cages are good, too. Only 45 grams, $9 now. They work great with my Podium bottles. My LBS carries cages that are similar.
My old aluminum cages marked up the bottles and the cages get worn down, too. The stainless steel cages look better and grip the bottles better since the metal has more spring to it. They are sturdy, you can slam the bottle back in the cage without looking down.