"2005 Arundel Chrono Carbon Fiber Water Bottle and Cage Combo $59.99

Repeat after us: One Trick Pony. It's not just a Paul Simon song (or is it a whole album??), but it's a reality about the Arundel Chrono carbon fiber water bottle cage. One trick indeed, but one trick it does worlds and worlds better than anything else out there -- it's the ultimate hydration system for your time trial bike. It's barely wider than your average downtube, and it has an incidental fairing effect proven to make your bike more aerodynamic than having no cage on your frame at all.

A quick look at the Chrono tells the whole story: Unlike every other cage out there, you'll find no "arms" that embrace a bottle. Rather, the bottle (when you buy a Crono, you're buying a cage AND a bottle) is molded to snap into the cage. No cage arms means substantially less drag -- it's an elemental part of the Crono's near-invisible profile. The bottle pops in and out of the cage with no brainpower, and when the bottle is in the cage it absolutely, positively will not eject from the cage. If you've been time-trialing with one of those bulky between-the-aero-bar bottles with a straw sticking out of it -- throw it out! The Chrono is more aero, less clunky, and it contains more than enough water for a 40km TT."