Removing shoes and coats and taking laptops out of bags for airport security checks is a routine hassle for air travelers. Restriction on sizes of liquid-bottles is another frequent headache.
Many airports around the world have state-of-the-art machines and security procedures that avoid such hassles for passengers. Japanese airports have been using Bottled Liquid Checkers for many years to scan cans and plastic bottles for potentially hazardous liquids. This allows passengers to bring full-sized liquid bottles on flights.
Unfortunately, the TSA is lagging far behind in such airport security technology despite presumably working on such liquid scanning systems for many years.
More information was in an article that is no longer available on the Aviation Queen blog.