No need to use your ice cube tray to store homemade baby food. Here is a much better solution – one that is individually contained with a lid and in old school BPA free glass!! Each is the perfect size of 4 oz with an airtight lid that is safe enough to throw in your bag for on the go feeding. The glass is ultra durable to withstand freezer to heating – I always steam my food because microwaving destroys all the nutrients but if you must this is absolutely microwave safe. Comes in a set of 4 in either green or pink, at Wean Green Wean for $29.95.