💧 Empty water bottle

Any water bottle with liquid remaining will be stopped at the checkpoint — even a few sips left at the bottom counts as a liquid over 100ml. The screener will ask you to either empty it completely into a drain provided near the checkpoint or surrender it. Once it is confirmed empty, you can take the bottle through and refill it at a water fountain or cafe on the other side of security.

No region restricts empty, clean water bottles in carry-on or checked baggage — the rule everywhere is simply that the bottle must be empty at the security checkpoint itself. A handful of airports in water-scarce regions have limited airside refill options, but that is a convenience issue rather than a security rule.

Screeners may give an unusual or opaque bottle a second look to confirm it is empty, and insulated bottles with thick walls can sometimes appear dense on X-ray. Unscrewing the lid and placing the bottle upside-down on the belt before it goes through the scanner is a quick way to show it is empty and speed up the process. Wide-mouth bottles are easiest to inspect quickly.

Empty and rinse the bottle at home or at a bathroom before you reach the security queue — trying to drink down the last of the water while standing in line is stressful and not always practical. After clearing security, look for a water refill station (many airports now have them near restrooms) or any airside cafe. Keeping the bottle in an outer pocket of your bag makes it quick to pull out at the checkpoint without unpacking everything.