Quality material and beautiful construction... the provided insulative sleeve make great for warm beverages on the go and I imagine could be used to handle boiling containers during a camp scenario if left without more safe alternatives (this is yet untested by myself)... the single walled construction allows for effective water cooking,,, the lid is formed of a provided cap and traditional screwing component... this makes for loud removal and replacement of the cap when drinking... the only temporary component to be observed is a plastic sealant ring on the inside of the cap... I imagine this is the only component which will need eventual replacement.
Overall, a very fine product that I believe will stand the test of time.