For international travel in 2026, the "3-1-1" rule for liquids (3.4oz/100ml containers in one quart-sized bag) still applies at many older airports, though newer CT scanners at major hubs now allow you to keep larger liquids and electronics inside your bag. You are generally permitted to carry essential electronics (laptops, tablets), a change of clothes, and solid snacks. However, lithium power banks must be in your carry-on, not checked luggage, due to fire safety. Prohibited items remain standardized: no sharp objects (knives, large scissors), no explosives, and no liquids over the limit unless they are medically necessary or baby formula. In 2026, security is increasingly strict about "unlabeled" powders and batteries; always ensure your tech has clear watt-hour (Wh) labels. For 2026 international custom rules, remember that "duty-free" liquids purchased at the airport must remain in their sealed "STEB" bags to be allowed through connecting security checkpoints.

For an international flight in 2026, your carry-on should follow the 3-1-1 rule for liquids: containers must be 3.4 ounces (100ml) or less, all fitting into one quart-sized clear plastic bag. You are encouraged to pack essential electronics (laptops, tablets), power banks (which must be in the cabin, not checked), and high-value items like jewelry or medication. Prohibited items include sharp objects (knives, large scissors), "disguised" weapons, and liquids over 100ml unless they are medically necessary or baby formula, which must be declared. A "pro-tip" for 2026 is that many airports now use CT scanners that allow you to keep liquids and electronics inside your bag, but you should still pack them accessibly just in case. Always include a change of clothes and a reusable water bottle (empty through security) to ensure you stay hydrated and prepared for potential luggage delays upon arrival in a new country.