When it comes to flying, there are certain restrictions on what food and beverages you can bring with you. Solid foods, such as sandwiches, can be transported in either hand luggage or checked baggage within the continental United States. However, liquid or gelled foods that weigh more than 3 or 4 ounces are not allowed in hand luggage and should be placed in checked baggage if possible. It is important to check with your airline before bringing alcoholic beverages onboard, as the Federal Aviation Administration (FAA) prohibits travelers from consuming alcohol on board an airplane unless served by a flight attendant. Flight attendants are not allowed to serve a passenger who is intoxicated.
You are allowed to carry water, soft drinks, juice and any other non-alcoholic beverages in your checked bags without any restrictions. If you want to bring a bottle of water or soda on board, you have to follow the universal liquid rule, also known as the 3-1-1 rule.