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Regarding this, what liquids are not allowed on planes?

You are allowed to bring a quart-sized bag of liquids, aerosols, gels, creams and pastes in your carry-on bag and through the checkpoint. These are limited to travel-sized containers that are 3.4 ounces (100 milliliters) or less per item.

Similarly, why can't you bring more than 100ml on a plane? The regulation which allows only 100 ml liquids, gels, and aerosols to be carried inside the plane was introduced in 2006, after the British Police uncovered a terrorist plot to ignite liquid explosives that were carried on board seven airliners travelling from the UK to the United States and Canada.

Also asked, can I bring sealed liquids on a plane?

Any liquids bought at the airport or on the plane are allowed in your carry-on luggage, even if over 100ml. However, you're not allowed to swig from your bottle of vodka during the flight as all items should remain unopened and sealed in an airport security bag with a visible receipt.

Why are aerosols not allowed on planes?

Aerosol Dangers Anything flammable is carefully regulated, of course, and almost all aerosols are flammable, if only because of the propellant gases used in the cans. The changes in pressure and temperature on an airplane can cause aerosols to leak, ignite or even explode, in rare cases.