I have a 750ml Camel bottle that I can shove into my Planet Bike bottke cage, or my Specialized Side Entry cage. It doesn't actually fit but it does hold. UNforunately the bottle is getting quite scuffed and it's not so easy to remove while riding.

Terry Bicycles says their Nalgene bottles which are similar in size and shape, fit their carbon bottle cage but $60 is a bit beyond my budget.