WHAT DO YOU MEAN, 1 FLUID OUNCE OF WATER DOESNT WEIGH 1 OUNCE

America are you OK over there???

WHAT DO YOU MEAN, A FLUID OUNCE IS DIFFERENT IN THE US AND UK

AND THEN THE US HAS A THIRD DIFFERENT FLUID OUNCE

Okay apparently the US and UK use the same ounce for weight, and the UK fl oz is 1 oz weight of water, but the US fl oz is slightly different and is apparently based on how wine was measured in the UK pre-1824???

everything I find out about imperial measurements just makes me more perplexed

Also apparently there is a separate definition for US food labelling that is exactly 30mL which is hilarious
@daisy Reminds me of one of the first times I went to the UK, and noticed every pub had a sign saying how big their "shot" was; typically 20ml or 30ml, IIRC