Klean Kanteen's 8oz Insulated Tumbler will be the mug you sip your morning doppio or flat white from, and the cup you use when you're ready for an old fashioned or barrel-aged brew. The 18/8 stainless steel ensures that your beer or other tasty treat retains its own flavor and doesn't come away with any sort of metallic taste. The double-wall vacuum insulation keeps things hot or cold to the last drop. Comes with press-fit Simple Lid (NOT leak-proof).