The rules about what you can and cannot take on an aeroplane are confusing. Not only are there a lot of weirdly arbitrary rules, but the exceptions are so inconsistent it makes it hard to just apply common sense. Here, however, you can find a list of at least some items that you can take on a plane.
This graphic from travel site Cheap Flights, shows a non-comprehensive (but practical) list of items that you can take on a plane. Some of them may even seem contradictory to established rules. For example, while fluid bottles larger than 100mL are usually prohibited, mothers can bring larger bottles of breastmilk. The chart also covers items that are allowed in checked luggage, which includes alcohol and even firearms.
Things you might not know you can take on an aeroplane [Cheap Flights via Design Taxi]