The BBML or Baby Meal can be ordered for infants under 2 years of age (depending on the airline, some airlines will only supply the BBML to an infant up to 10 months only) and will normally consist of pre-packaged baby meal products.
If for some reason a meal is actually provided it will not contain solid foods, meat with bones, spicy foods, wheat, gluten, fish, eggs, acidic fruit, pork, or beef. Generally, the meal will consist of: fruit, vegetables, strained food and purees.
Most airlines worldwide offer a baby meal special meal service if you need to check on a specific airline view the airlines section to read about the airline you’re flying with.