I just bring one bottle these days, and hydration bladders. Sometimes I worry about hydration bladders failing, but I've only had one get a slow leak. BITD I did lose 2 liters of water from a bottle. I had two 2-liters in my trunk bag, I'd finished one and when I went to fill my water bottle from the second 2-liter bottle I noticed my trunk bag was all wet and only about 200 ml left in there This being a 120-mile ride out in the desert, I was really looking forward to that water. Luckily an hour later I came upon the mobile home of a Navajo preacher, and he kept bragging "Oh yeah, this is even city water!" and gave me some hominy casserole to eat also.