atula asks:Steel water bottles

We have recently gone with stainless steel and aluminum water bottles. They seem to keep water colder for much longer. After 7-8 hours at room temperature, the water is definitely pretty cold. They do "sweat" however - so those bottle sleeves may help. That said, plastic bottles also have condensation - but the water inside gets warmer and slightly weird tasting (thanks to using #5 bottles and not BPA-embued polycarbonate). A friend also uses her stainless steel water bottle for milk and warm drinks - and she says it works great (and cleans well if the bottle neck is not too narrow).