Here's why:
* Grams and ounces are standard units for measuring weight, and margarine is a solid at room temperature.
* Liters or milliliters are used for measuring volume, which is more relevant for liquids.
* Other units like pounds or kilograms might be used depending on the size of the tub and the country where it's sold.
So, the next time you buy a tub of margarine, check the label for the weight in grams or ounces.
