Normally where do you get the 20cmx20cm resealable transparent bag and 100ml containers for flying with liquids?
I assume liquids need not be in their original container, and you can fill 100ml containers with whatever you need to carry (sunscreen, shampoo, and so on).
How strict is enforcement regarding the size and type of all these items? Can a container be 120ml? Can the bag be smaller or bigger, a common freezer bag or a zip-top bag for sandwiches?
This is regarding internal EU flights.