The Dave-O carbon bottle cage is made in a compression mold. Layers of fabric are placed in the mold by hand, the mold then goes to the press where it is subjected to temperatures around 250 degrees and pressures close to 1000 psi. The carbon cages weigh in at 30 grams, and so far have proven to be quite strong, given the fact that they are extremely lightweight.
Some of the early test cages were in the 18-22 gram range but the bottles weren’t always secure. The design parameter was to choose a design that was not only light and durable, but would prevent the bottles from ejecting out of the cage, since there is nothing more frustrating than losing contact with the bunch just to retrieve an errant water bottle.