D7 Bottle

That double o-ring sealed cap really does the trick—I filled it with boiling water at 8am and it was still steaming when I opened it at lunch. The cup lid is a nice touch for sipping without unscrewing the whole thing.

The cup lid is what sold me and it doesn't leak at all thanks to the double o-ring seal. Filled it with ice water at 7am and there was still ice clinking around at dinner.

Left this in a hot car for six hours and the water was still cold enough to sting my teeth. The cup lid is a nice touch since I can pour a bit out instead of chugging straight from the bottle.