These double wall coffee glasses by JoyJolt are pretty awesome and would be a great addition to any one's coffee mug collection. They are super light despite being double walled. The double wall also does its job well by keeping the outside from getting too hot to the touch. It also holds a decent size cup of coffee (or tea)! The only thing I couldn't figure out was if it is microwave or top rack dishwasher safe because there were no instructions or symbols to say. So I'd recommend hand washing unless you figure it out. But the cup is still great!