It's also hilarious that the limit is the very metric 100ml, and not some even number of freedom units like 3 or 4 fluid ounces, like Jesus, George Washington, and bald eagles would have wanted.
UK uses the metric system. Why would anyone expect UK to follow the imperial system in $CURRENT_YEAR?
TSA (at ohare) has a repeating thing that says 100ml or 3.2oz over the loudspeaker (never mind they are different amounts)