Q: Are there limits on how much liquid soap I can bring through port security?

A:

Yes, port security typically enforces liquid limits identical to airline rules. Each liquid soap container must be 100ml or less, and all containers must fit inside one transparent, resealable 1-liter bag. This applies to carry-on luggage; checked bags have fewer restrictions.

Think of it like a sewer main: security scanners are calibrated for specific volumes, just as pipes are sized for flow. Large, opaque liquid containers can obscure X-rays, creating blind spots where threats could hide, so limits standardize the load for clear screening.

Use 100ml travel bottles for liquid soap or switch to solid soap bars, which have no volume limits. For a Yangtze cruise, pack your liquids in a sturdy quart-sized bag and place it atop your carry-on for easy inspection. Consider purchasing full-size soap at port stops if needed.