The glass portion set includes 2 portion jars (2 x 250 ml). They are made from extra durable glass and are 100% manufactured in France. They can withstand heat and cold, making them suitable for sterilizing, freezing, or warming (freezer, microwave, and dishwasher). The hermetic silicone lids are easy to attach and keep the flavors and taste intact thanks to this seal. Each jar features a dosage indicator. They can be easily and conveniently cleaned by hand or in the machine.