You cannot bring more than 100ml of liquids onto the plane!

The limit on the amount of liquid you can bring on board was introduced in 2006 after British police uncovered a terrorist plot to detonate liquid explosives.

The regulation, which only allows 100 millilitres of liquids, gels and aerosols, came into force in 2006 after British police uncovered a terrorist plot to detonate liquid explosives on seven flights from the UK to the US and Canada.

Ahmed Ali, an Englishman from Birmingham, is said to have been the intermediary between the plotters and al-Qaeda. Police found soft drink powder and a large number of batteries in Tang's suitcase, which alarmed authorities.

It later emerged that the perpetrators had made bomb-like devices from drinks bottles and planned to detonate them later on board.

Liquid restrictions were soon imposed on hand luggage, with a few exceptions, such as baby food, which passengers were required to taste before boarding.

After that, for a while, liquids were completely banned on board, but then the amount of liquids allowed was limited to 100 ml.

The liquid restrictions were introduced precisely because it is difficult to screen liquids and determine whether they are dangerous.

However, there are some exceptions to this restriction, such as prescription drugs, life-sustaining fluids, and infant formula. New technologies are also being developed at airports to more accurately screen liquids and overcome the restrictions.