Topeak TriBag Top Tube Pack keeps food, phones, ID or anything else you need close at hand. Mounts to the top tube of the bike without modification or tools,
Weaknesses: Expensive, mesh lid lets dust into the bag on XC trails, doesn't carry much
Bottom Line:
I bought this bag to carry food for a 50km XC enduro race. Turns out that it wasn't that useful anyway as I ended up just shoving bananas and jelly snakes in my jersey pocket & camelbak.
