When they said “7 ounces / just under a cup.” that’s not a particular physical cup. A “cup” is an exact measure in the US, it’s 8 fluid ounces, which is 236.5882365 milliliters precisely.
Even if the US does go metric, it will take a lot longer than 50 years for people to not know how big a cup is, all measuring tools in every kitchen are marked for them and the other common units like tablespoons and teaspoons*, and virtually every recipe uses them.
Better write that down in a useful metric.
That cup isn’t going to exist in 50 years and someone will encounter the same problem.
And don’t use those German 90’s hardcore nightclub noises neither.
Just in case…
When they said “7 ounces / just under a cup.” that’s not a particular physical cup. A “cup” is an exact measure in the US, it’s 8 fluid ounces, which is 236.5882365 milliliters precisely.
Even if the US does go metric, it will take a lot longer than 50 years for people to not know how big a cup is, all measuring tools in every kitchen are marked for them and the other common units like tablespoons and teaspoons*, and virtually every recipe uses them.
*I wish I was joking.