I personally can’t drink water that is too cold wheather I’m biking or not but i do like to keep it from getting so warm its hotter then I am plus when i do Get a drink I drink very little at a time just enough to wet my whistle so to speak….But the person theat started this thread and a few others were trying to figure out a cheap way to insulate there camelbaks better on my last post I think I came up with a pretty good solution.. Before I upset anyone any further I do agree with what FatBilly and MTBGreg is saying bout drinking too much really cold water I personally have a tendency to get sick if I drink Too much water anyhow let alone if it’s really cold then I’m really asking for it