Black Box New A bold range for creative minds: made of 70% recycled glass at the heart of our factory, Black box combines durability, functionality and style. It is the ideal range for batch cooking, as it has an opaque black base to showcase your creativity while protecting your food. Durable and waterproof, it is easy to carry and ideal for those who are always on the move. It has a valve, so it can be transferred from the freezer to the microwave without removing the lid to avoid spills. All the containers are dishwasher safe. This collection is available in several rectangular, square sizes.