When it comes to wine, two common things you can notice anywhere in the world are that most standard wine bottles contain exactly 750 milliliters of wine and that the bottles are always dark in colour. But have you ever thought why? Well, according to experts the answer is a combination of history, trade practices, human habits, and practical considerations. Scroll down to find out.Where did the standard come fromWhile no documentation exists to date, one popular idea is that early glassblowers could only blow about 750ml of air in a single breath, and since the bottles were shaped by hand, the size was basically determined by their lung capacity. Another school of thought is that 750ml matches what a person might drink with a meal, which is around six glasses.Role of International wine tr