Good Water Bottle?



Camelbacks are good, as mentioned upthread. I don't use one personally but a few people I ride with have them and I know they really like them. I have a Contigo bottle with a flip top that I really like because it's a decent size, fairly hard wearing, and opens and closes with a little button so it's easy to manage with one hand while riding.
 
I have a special bottle which fits in the holder in the bike frame which is quite useful since you don't have to carry a back pack.