The TorHans company is bringing some thoughtful engineering into the world of aerobar-mounted hydration. I took an in-depth review at their Aero 20 product, which is both easy to use, and tests very well in the wind tunnel. See the article for a link to their wind tunnel data.
Koala has made a novel bottle and cage system with magnetic retention. They asked me to review it, and said I'd love its BTA applications. How'd it measure up?
The Speedfil A2 is here, and it's trying to be the best of all worlds in front-mounted hydration. Hit the review to see whether the effort has paid off.