Among non-systematic units for volume evaluation, there is such an interesting option as cups. They are most often utilized in cooking and recipes. It may be convenient to measure the volume of some product with a cup. In addition, there is no need to be very accurate and precise in the amount required. However, there is a trick with cups due to some cultural and traditional differences. Thus, there are at least four different values for this unit, namely: European or metric corresponds to 250 ml; American or cup (US) ranges from 237 to 240 ml; English is equal to 284 ml; Japanese is only 200 ml. Altogether, we observe quite a big difference in 50 ml between Japanese and European cups and this can be crucial for the recipe. Furthermore, products with different grinding will differ in their values, both in volume and mass. That is why it is better always to check which cup was mentioned in the recipe.