The Instant Pot yogurt set can make five 5 ounce (150ml) cups of yogurt. The rack may also hold five 9 ounce (260 ml) feed bottles for sterilization by pressure steaming to kill bacteria, fungi and viruses. To sterilize, place the rack with feed bottles spout down into the cup holder, add 2 measuring cups of water, run the steam program for 10 minutes. The pressure may be released quickly if required at the end of the cycle. Feed bottle accessories and valves may also be positioned on the rack. Note: Please use caution when removing, as the parts will be hot. Designed to work with any 22 cm pressure cooker with a minimum capacity of 5 Quart.