UA Beyond 18 oz. Vacuum Insulated Water Bottle
"Love it...Love it!...There isn't any, which in reality isn't a problem and keeps the bottle rather quiet.It has kept my cold water cold and I mean Ice cold for over 12 hours in cooler conditions as you would imagine.The bottle is extremely easy to operate with one hand and is easy to carry is well, I'd recommend this product to anyone interested.I read a review that the flat black and dark colors are easy to scratch up, I've yet to scratch my black bottle but am still quite careful.P.S The actual brand of the bottle...I have had it knocked over to a hard floor even dropped it on the ground a few times there is still not a single scratch or dent."