[lysium]

Fortunately, all ingredients in a recipe are usually given in 'cups'. If you use the same cup for all ingredients, the proportions of the ingredients stay the same, which is the most important part of a recipe.

It does not matter if you use a big cup, a tea cup or a coffee mug. The meal will still taste good, as the proportions are kept.

While for a 'metrical' recipe you need something that can measure weight and volume, for a 'cup' recipe you just need a cup, no matter what kind of cup.

[trezor]

I realize this is totally derailing the original topic, but I'd just thought I'd correct one incorrect assumption you've made:

Fortunately, all ingredients in a recipe are usually given in 'cups'.

Not even remotely true. Especially with "cups" of water and "tablespoons" of chilli the results can be rather interesting ;)