The smallest shot glass, known as the "Fly," holds 15 ml. The history of this shot glass is linked to the emergence of the first taverns in Russia. They were opened by order of Emperor Peter the Great. The taverns were meant to replace taverns and become establishments where visitors could not only drink but also eat. To attract visitors to the taverns, Peter ordered their owners to serve the first shot for free, counting on the fact that guests would then order drinks and snacks for payment. Knowing the peculiarities and habits of their guests (to drink the first shot for free and then leave), the owners of drinking establishments wanted to make shot glasses of small size, which held from 10 to 15 ml of liquid - exactly one tablespoon. It was precisely because of this small volume that this shot glass received the folk name "fly." But those who liked to drink for free found a way out of this situation: during the day, they visited various taverns. After several free "fly" shots, the tavern guest left in a good mood. And in the people, the expression "to walk under the fly" began to be applied to slightly intoxicated people.