Help feeding 11 month old

So my husband and I decided to take our son to the zoo for an early bday since he won’t have a party or any get together. We decided we would be all day at the zoo and I’m wondering what can I take to feed my lo, he has formula but he’s eating solids and I’m not sure what to make that he can eat at room temp or if I should feed him anything else. Any moms have any ideas or tips for me please