In a chimney flue, a damper closes off the flue to keep the weather (and birds and other animals) out and warm or cool air in. This is usually done in the summer, but also sometimes in the winter between uses. In some cases, the damper may also be partly closed to help control the rate of combustion.
A little more detail will help us answer your question. If your snacks are pretzels, potato chips, dried fruit or other dry goods, you can take them in your carry-on or checked bag. Snack items that are liquids or gels, like pudding, jello or yogurt, etc., falls under the 3-1-1 rules for liquids for carry-on bags. They can be transported in checked bags.
You can travel through security with formula, powder or liquid. Baby food and juice are also permitted. Technically, you are only supposed to carry enough for the flight and check the rest, but realistically, I'd bring a little more to cover any delays or luggage issues on the other end.ou are encouraged to travel with only as much formula, breast milk, or juice in your carry-on needed to reach your destination. You are allowed to bring gel or liquid-filled teethers, canned, jarred, or processed baby food in your carry-on baggage and aboard your plane.