Carry the bottle through empty

Yes, if it's empty, and thirteen separate conversations say the same thing: the rule at the checkpoint limits filled containers and exempts empty ones, so an empty bottle goes through like any other object and you fill it on the far side. In the United States the rule is the one on the airport signs — liquids, gels, creams and pastes in containers of 3.4 ounces (100 millilitres) or less, all fitting in one quart-sized bag — and an empty bottle has no liquid in it to measure. Several single accounts add that fountains and bottle fillers sit just past security in the US airports the people here name, often beside the toilets; if you can't find one, one person says a café will fill a bottle if you ask, and another that airport tap water is drinkable even where it tastes of the pipes. Now the honest parts. Two accounts describe an officer refusing an empty bottle anyway, and two separate conversations note that officers have the final say at the checkpoint and apply the rules unevenly; if it happens, the choice is to bin the bottle or miss the flight, so don't carry the bottle you'd grieve. If you forget to empty it, three single accounts drink the contents in the line rather than pour them away, and one mentions that some airports have a pouring station before the checkpoint. One account reports a full bottle going through unnoticed; that is not a plan, it's luck, and the rule is the rule. Whether it's worth the bother depends on where you fly, and the people here argue about that from their own airports: fountains after security are common in the US and, single accounts report, in the UK and at big airports in Europe, the Middle East and Asia, often near the washrooms; one person found none at a major Italian airport and used a bathroom sink; and one account had it work more than once on international flights into the US while another was told it wouldn't. Country rules differ too. For years the UK's rule was that liquids had to be in containers of 100 millilitres or less — as of 2026 that has been lifted at Heathrow, Gatwick, Edinburgh, Birmingham, London City, Bristol and the Belfast airports, where new scanners allow containers up to two litres, while Manchester, Stansted, Luton, Glasgow and Liverpool still enforce 100 millilitres; the government's stated aim is every major UK airport by the end of 2026, and it has slipped before, so check your airport's page the week you fly. Two smaller things. Two single accounts prefer a soft collapsible bottle that rolls into a pocket when empty; and if you fill a bottle with a straw spout or a drinking bladder before take-off, one conversation on each side of a small argument agrees it will spurt as the cabin pressure changes, so open the lid before you drink. One more from a single account: being pleasant to the officers doesn't change the rules, but it makes the minute go faster.

Solid food, yes, and six separate conversations pack it: sandwiches, fruit, crisps — one account adds pickles and gummy sweets — eaten in the terminal during a delay or on the plane. The rule that trips people is the one about texture. Anything spreadable or paste-like counts as a liquid at the checkpoint — peanut butter, soft cheese, cookie dough — four accounts in one conversation say so, and one had cookie dough stopped as a gel; if it's over 3.4 ounces (100 millilitres) it goes in the bin unless it's already spread inside a sandwich. Three single accounts use the freezer trick: a bottle of water or a soft food frozen solid is a solid at the checkpoint and is allowed, and it thaws into a cold drink by the gate — but it must still be frozen solid when it's screened, not slushy, or it's a liquid again, and one account notes an officer's judgement decides the edge cases. Two things about the scanner itself. Food in a bag reads oddly on the screen and two single accounts say it earns a bag search or a swab; one takes the food out and puts it in the tray on its own to save the delay. And two conversations say the machines throw false alarms on ordinary items, so a search isn't an accusation. Two single accounts ask, on behalf of everyone else on the plane, that you don't bring tuna or anything else that fills the cabin. Where you land matters more than where you leave. Across three separate conversations, people flying into another country warn that fresh food — fruit and other organic leftovers, anything that was alive — often may not be brought in, and that you should eat it or bin it before the passport queue, and declare whatever food you still have, sealed snacks included; US customs' own guidance adds that the penalty is for failing to declare, not for the food. One single account notes that a few airports set their shop prices to match the town outside, so a look at the menu board before you unpack the sandwich costs nothing. Three conversations turn the tip around: if you're meeting someone off a long flight, bring them water and something to eat.

Two separate rules, and the people here are clear about both. Bringing them: yes. Six separate conversations confirm that miniature bottles of spirits — the miniature size, under the limit — are under the 3.4-ounce limit and go through security in the same quart-sized bag as your toothpaste, and one account extends the same logic to sample sizes of anything you'd otherwise buy at the gate. The bag is the constraint, one person notes, so it's a few miniatures, not a party. Drinking them: no, not on a US flight. Across five separate conversations people report the same rule, and that how strictly it's enforced varies: a federal regulation says no passenger may drink alcohol aboard the aircraft unless the airline served it, which means your own miniature stays sealed in the air even though it flew there legally. Some crews look the other way and others don't, and arguing with a crew about it costs far more than the drink you were saving on. This page therefore carries the miniature as a way to arrive with a drink for the hotel room, not for the seat. For hot drinks, one person packs a collapsible kettle and a pour-over cone and makes coffee at the gate; the simpler version is the empty bottle and a coffee at the other end.