I always had a packet of baby cereal in my bag just in case (Gerber makes individual packets, you can buy a box of them) and a spoon. I could always mix it with water in a pinch if needed. Sometimes I toted jars, but since I made almost all of his food, I'd usually put it in several small covered containers or in the compartments of a covered divided toddler plate. I bought a little insulated lunch bag, I'd toss a freezer pack in there, and we'd be on our way.