One airport, however, is making an exception to the 100ml-maximum rule for taking liquids onboard.
From the start of June, tourists flying out of Genoa airport in northern Italy have been allowed to take larger quantities of liquids in their cabin baggage.
The catch? The 100ml limit is only waived for those taking pesto, the region's famous sauce made of garlic, basil, pine nuts and cheese.
Genoa's Cristoforo Colombo airport launched the 'Il pesto è buono' (Pesto is good) initiative at the start of June, allowing passengers to take jars of pesto up to 500g on board, in exchange for a donation to Flying Angels, a local charity which provides flights for seriously ill children who need to travel overseas to receive care.
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Airport authorities came up with the idea "after being faced with the hundreds of tins of pesto which are confiscated every year at Genoa Airport's security controls", they said in a statement.
Tourists unwilling to part with their oversized pesto jars can ask for a sticker in exchange for a charity donation, and staff then scan the jars in a special x-ray machine.
In the first 20 days of the project, more than 500 passengers have taken part. According to the airport, the initiative has been "particularly appreciated by locals from Liguria" who no longer have to go without their regional specialty when holidaying abroad, but several tourists have also taken advantage of the scheme to take home a garlicky souvenir.
The pesto must still comply with some limits: passengers can either take one 500g jar or two jars of up to 250g. They can only be taken on direct flights from Genoa, and the pesto in question must be Genovese.
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