Darf man Wasserflasche ins Flugzeug mitnehmen? (TSA & USA Flugregeln)

Ja, in Behältern bis 100 ml (3,4 oz), verstaut im transparenten 1-Liter-Plastikbeutel.

Ja, Flüssigkeiten und Pflegeprodukte in größeren Behältern sind im Aufgabegepäck erlaubt (Aerosolgrenzen beachten).

Limited to what fits inside a single 1-quart (1-liter) transparent resealable bag in carry-on.

Yes, passengers may use Water Bottle during flight in compliance with crew instructions.

Yes. Major brands such as Hydro Flask, Stanley Quencher, Yeti Rambler must comply with standard security limits based on physical properties rather than brand labels.

Standard toiletries and liquids conforming to the 3-1-1 rule (containers under 3.4 ounces / 100 ml inside a clear quart bag) require no separate declaration. You simply place the bag in a screening bin. Medically necessary liquids exceeding 3.4 ounces must be verbally declared to checkpoint screeners before inspection.

If liquid containers exceeding 3.4 ounces (100 ml) are detected in carry-on baggage without an infant or medical exemption, screeners will not allow them past security. Travelers must surrender the item for destruction, return outside security to place it in checked luggage, or mail it home.

An empty bottle, yes — through any US or Canadian security checkpoint. A filled one, no, unless it is frozen completely solid at screening.

Yes, an empty water bottle of any size or material (stainless steel, plastic, insulated) is permitted through airport security checkpoints. Water bottles filled with liquid over 3.4 oz (100 ml) must be emptied before screening; you can refill them for free at terminal hydration stations after security.