I love the gallon ziploc storage bags. I use them for everything. Storing left overs from dinner,putting smaller bags of breast milk into them, Halloween candy and even toys.
I use the gallon (larger sizes too) ziplock bags to store my knitted projects to prevent them from being snagged during storage, accidental spills while traveling. Have used them to carry works in process and the bags hold up to the challenge. Of course they are great for storing food or any other item you choose.