If you're looking for an alternative to plastic bottles, I keep a case of Aqua Blox in my truck year-round as an emergency supply and it seems to handle both freezing and 100+ degree temps without any ill effects. The juice-box packaging is rated for 5 years storage and has an impermeable liner to prevent funny tastes or leaching. The last case I rotated out after 3 years tasted fine and I lived to tell the tale. Just my $.02.