Applying the Rule to Different Containers The regulation applies to the container itself, not the amount of liquid remaining inside. In these situations, purchasing larger containers at your destination is often the most cost-effective strategy.
TSA 3-1-1 Rule Travel Size Guide for Containers
4 ounces is slightly larger. 4 ounces (100 milliliters) or less.
If you must bring larger sizes, ensure they are packed in your checked baggage, where volume restrictions are generally non-existent. Common Household Item Typical Size Travel Status Standard Hotel Toiletry Bottle 500ml Not Allowed Travel Size Bottle 100ml Allowed Small Perfume Sample 10-20ml Allowed Liquid Medication Varies Allowed (Exempt) Exceptions and Special Considerations Not all liquids are subject to the 100ml limit.
TSA 3-1-1 Rule Travel Size Guide for Containers
All containers must then fit into a single, clear, quart-sized plastic bag, with one bag permitted per passenger. It is the physical dimensions of the bottle that matter, making it crucial to check the label and the bottle's dimensions before packing.
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