Personally, when I see a post about light cages in WW I’d like to think of something below 10grm. I’ve looked for <10 grm cages that fit most bottles and don’t break or trap/loose bottles. Harder to find than one would think really. Especially without spending a fortune. Then again, after close to a dozen types I think for the time being I’ll settle for these knock off Lightweight ones. Close enough for now!!
These above were/are my favourite, but they broke the bottom tab in a couple after years of use. I had a pair in several bikes but now use a single one in most bikes holding a cut off bottle with my spare tubular. Fairwheels Bikes used to sell them (New Ultimate?) but haven’t seen them for sale in ages. Used to be $65 each (ouch!!)
Mandibles are reliable and bullet proof, but deform every bottle I’ve used, are heavy, and are hard to get bottle in/out. Awesome design though!!