It's still winter down here, so it only gets up in teh 60's/70's usually, so I carry a bottle of milk, drink it when I get to a convenience store in two hours, buy a replacement, carry it to the next convenience store. I like having it there with me, rather than buying a new one, in case I feel like I'm going to bonk.

In summer, I iwll have to revise my plan. Maybe carry some blue ice or something, since I will be doing shorter rides in predictable weather so won't have to worry about the weight.

Nanci