KALDI Mug Mug Material: Ceramic Capacity: Approximately 370ml Microwave and dishwasher safe. Not oven safe. Lid Material: Silicone rubber Heat resistance: -20°C to 180°C Dishwasher safe. Not microwave or oven safe. This is a silicone lid mug that came in a Glühwein set box. I washed it with the intention of using it, but I ended up never using it and it has been stored away. I will sell it to someone who will use it a lot. *Please refrain from purchasing if you are overly concerned about the condition, as it has been in someone else's possession once.