Come and Check Our Promo Solutions.Made of mouth-blown, lab-quality glass, this double wall glass mugs is scratch resistant and more durable to stand the daily use safe to heat in microwave or freeze in the fridge, giving a smooth finish and crystal-clean look. Thanks to the vacuum between the double wall borosilicate glass that doesn't conduct heat, the interior coffee is hot while the exterior wall will stay cool for hand safe touch. Hot drinks will not burn your hands and cold drinks will not form condensation. Pls check inventory and detailed info with us before placing your orders.