In my truck, I've got the entire bottom of my Rubbermaid Action Packer filled with a layer of Aqua Blox. They've been in there well over a year with no leaks or problems. I sample one every once and a while to make sure they are OK tastewise. It gets unbelievably hot in there in August here in Houston. No problems, so far. BTW - sturdy packaging makes for better quality, long-lasting products.