For those freezing cold, or extra hot days when you still want to hit the trail, the easiest way to keep your water from turning to ice is the Crux Insulated Tube from Camelbak.
This tube will also work to keep your water cool when the weather is warm, this tube uses antimicrobial technology which will assist with inhibiting bacteria growth on the surface of the tube and will keep your water supply cleaner over time.
For the active outdoorsperson who likes to get out rain or shine, the Crux Insulated Tube from Camelbak is going to keep your water supply at the right temperature in all kinds of conditions.
Antimicrobial technology that assists with inhibiting bacteria growth
Keeps water cold in summer, and from freezing in cold conditions
Includes: Crux delivery tube, insulated cover, big bite valve, and crux on-off valve