And three teaspoons in a tablespoon. No wait, dammit, it's four teaspoons, or is it ½ a fluid ounce? But is that a US fluid ounce, an imperial fluid ounce, or w

And three teaspoons in a tablespoon. No wait, dammit, it's four teaspoons, or is it ½ a fluid ounce? But is that a US fluid ounce, an imperial fluid ounce, or whatever they use for US food labelling that's different again? What part of the world was this recipe written in? Meanwhile one litre equals one litre (regional spelling variations notwithstanding).