I love this mug set from Francois et Mimi for so many reasons. This is a 4 piece mug set in a stackable rack. The mugs are colorful, and fun. They are not only useful and convenient, but they simultaneously make a great decoration for the kitchen.They are made of stoneware ceramic and can go in the microwave and dishwasher.I have run mine through the dishwasher at least 10 times already, with no problem.They are lead free. They all fit neatly into a nice silver rack, so they save space in your kitchen. I keep mine right next to the coffee maker which is so convenient. Another great thing about these mugs for me was that, we got a Keurig Mini around Christmas time and we had a bit of a problem with our mugs just barely fitting under the Keurig, but the design of this mugs is a bit shorter than the average, which not only makes them really cute but they fit perfectly under the Keurig, so as a result, these are the only mugs we use anymore.I'm very happy with these fun mugs. These would also make a great gift for and coffee or tea drinker. If you'd like to get one of these sets, you can find it on Amazon here.