La Rochere's Louison coffee mugs are sturdy and perfect for everyday use. Classic and timeless in design, our mugs are casual and elegant and will compliment any table, a beautiful way to serve coffee and tea at the end of your meal or at the start of your day. Easy to clean La Rochere glassware is dishwasher and microwave safe. Steeped in tradition La Rochere is the oldest working art glassworks factory in France. La Rochere's pieces are fired at a very high temperatures producing an exceptional quality glass that is crystal clear and durable. A pressure seam is sometimes visible, which is the mark left by opening the mould in which the glass is pressed. It is the characteristic of pressed machine glass and symbolizes its French heritage.