The term is of Arabic origin and means "handshake". This refers to the ancient custom of concluding a contract with a handshake and shared drink. According to another version, the origin was the Low German term for "schöpfen", which was borrowed into French as Chopine and then borrowed back again. In German-speaking countries, Schoppen is a very old measure of liquid with locally very different volumes. Mentioned are, among others, 0.564 l for the Palatinate, 0.459 l for Württemberg, 0.375 l for Baden and Switzerland, and for the French Chopine 0.476 l. In southern Germany, before the introduction of metric measurements in 1884, the bottle was the official designation for 0.5 l. Today in the Palatinate, a "whole bottle" means 0.5 litres. In Rheinhessen the volume is 0.4 litres, here there is also a "half pint" of 0.2 litres, known as a Halwe (half). Special wine glass forms with the contents of a bottle are Dubbeglas, Geripptes and Mainzer Stange. A bottle is therefore not bound to any particular glass shape.