Anonymous wrote:I send it in a gallon ziploc bag straight from the frig but do not send an ice pack. I tried putting it in foil, but she wouldn't eat it. When I put it in a ziploc, it gets eaten. No idea why. I can't imagine how you would get a piece of pizza in a thermos. I know my kid would not go for that.
If the foil touches the tomato sauce, the acid in the tomatoes can erode the foil and slowly dissolve bits of aluminum into the sauce. Although that takes time, overnight, it can impart a metallic taste to tomato sauce. Kids' taste buds are more sensitive to smaller amounts of flavors than adults. As you become more accustomed to certain flavors, you become more desensitized to them which is why many people who eat heavily salted or spiced foods often need more salt/spice to taste it. Kids are very sensitive to small flavor changes and can taste the slightly metallic flavor imparted to tomato sauce that has sat overnight touching aluminum foil. You should store pizza in cardboard or plastic and not in foil.