This Fortec tumbler from Wahei Freiz has a vacuum-insulated stainless steel body that keeps hot drinks hot and cold drinks cold. Because the outer wall does not conduct heat, cold drinks are less likely to form condensation, so the tumbler will not leave a wet ring on the table, and it stays comfortable to hold even when filled with a hot drink.
The exterior has a diamond-cut pattern under a fingerprint-resistant matte finish, with a clear coat over the powder-coated surface. In the 430 ml (14.5 fl oz) size, it keeps drinks above 47°C (116.6°F) or below 8°C (46.4°F) for at least an hour.
