Chilled drinks, zero dilution.

Every whiskey on the rocks runs on a clock. The longer you sit with it, the more the ice dilutes the taste, but with the Cold Core Tumbler, the rocks are out of the equation. A coolant-filled stainless steel base sits under the tumbler with its domed core rising into the center, so your last sip tastes like the first.

Whatever you pour around the cold core drops to 60°F in about 30 seconds and stays below room temperature for up to two hours. The tumbler is made from borosilicate glass, the same thermal-shock-resistant material used in lab glassware, so it handles the contrast between frozen steel and room-temperature spirits without stress. Pour, wait half a minute, and settle in. There's no ice racing you to the bottom of the glass.