A:AnswerIt's not a good idea to microwave due to the fact there's a sealed chamber of air which could expand and cause it to crack. However the high heat of the dishwasher is no problem
A:AnswerYup - I pour boiling water directly in these for tea nearly every day. No problems at all, and they barely get warm to the touch. Excellent purchase. :)
A:AnswerI received mine like in March and they said on the bottom not microwave safe. I think you cant use this on a microwave because of the double wall ao to be safe Don't put them inside the microwave.
"They are double wall insulated"
