Krispy,
I use avent cup, it can be used to store breastmilk as well as solid food. I put around 20-30ml as i give 2-3 cups per day. It also useful bec' if i want to give the food, i just warm it by placing the cup in the warmer, then i feed from the cup! so its v easy..
alternatively, u can use ice cubes and freeze them in cubes in ziplock bag, like wat cactus do.
Its good to store in make the food separately bec' if one food cause allergy, u dun have to waste the whole lot.
Oh ya the avent cups also quite cheap.. if u buy the big box, each cup only 20 cents i tink. the big box cost around $35 i tink, got 20 cups.