The centiliter (cL) is a metric unit of volume equal to one-hundredth of a liter, commonly used in European countries for beverage and spirit bottle sizes. Wine and spirit labels in the EU frequently display volume in centiliters alongside milliliters. One centiliter equals exactly 10 milliliters or about 0.338 fluid ounces.

The US fluid ounce (fl oz) is a volume unit equal to approximately 29.574 milliliters, used to label beverages, cosmetics, and personal care products in the United States. Beverage cans, shampoo bottles, and skincare serums all display their contents in fluid ounces for American consumers. One fluid ounce equals exactly 1/128 of a US gallon or roughly 2 tablespoons.