We got sick of going thirsty on winter runs because water froze in our reservoir hose and we got sick of drinking hot water on our scorching summer runs because the sun and our rising body temp boiled our hydration reserve. So we invested in CamelBak's StoAway 2L Insulated Reservoir and never looked back. We now stay hydrated and refreshed all year long so we can safely push our limits on trail races powder runs and hill bombs.