where did the custom of tipping come from
Gratuity According to the Oxford English Dictionary, the word "tip" originated as a slang term and its etymology is unclear. According to the Online Etymology Dictionary, the meaning "give a small present of money" began around 1600, and the meaning "give a gratuity to" is first attested in 1706.[9] The noun in this sense is from 1755. The term in the sense of "to give a gratuity" first appeared in the 18th century. It derived from an earlier sense of tip, meaning "to give; to hand, pass", which originated in the rogues' cant in the 17th century. This sense may have derived from the 16th-century "tip" meaning "to strike or hit smartly but lightly" (which may have derived from the Low German tippen, "to tap") but this derivation is "very uncertain".[10] The word "tip" was first used as a verb in 1707 in George Farquhar's play The Beaux' Stratagem. Farquhar used the term after it had been "used in criminal circles as a word meant to imply the unnecessary and gratuitous gifting of something somewhat taboo, like a joke, or a sure bet, or illicit money exchanges."[11]
Drink can In 1959, the recyclable aluminum can was introduced to the market in a 7 oz. size by the Adolph Coors Company. Also in 1959, Ermal Fraze devised a can-opening method that would come to dominate the canned drink market. His invention was the "pull-tab". This eliminated the need for a separate opener tool by attaching an aluminium pull-ring lever with a rivet to a pre-scored wedge-shaped tab section of the can top. The ring was riveted to the center of the top, which created an elongated opening large enough that one hole simultaneously served to let the drink flow out while air flowed in. In 1959, while on a family picnic, Mr. Fraze had forgotten to bring a can opener and was forced to use a car bumper to open a can of beer. Thinking there must be an easier way, he later stayed up all night until he came up with the pull tab.[4] Pull-tab cans, or the discarded tabs from them, were also called "pop-tops" colloquially. In Australia these were colloquially known as "ring-pull". Into the 1970s, the pull-tab was widely popular, but its popularity came with a significant problem, as people would frequently discard the pull-tabs on the ground as litter, or drop them into the can and risk choking on them. These problems were both addressed by the invention of the "push-tab". Used primarily on Coors Beer cans in the mid-1970s, the push-tab was a raised circular scored area used in place of the pull-tab. It needed no ring to pull up. Instead, the raised aluminium blister was pushed down into the can, with a small unscored piece that kept the tab connected after being pushed inside. Push-tabs never gained wide popularity because while they had solved the litter problem of the pull-tab, they created a safety hazard where the person's finger upon pushing the tab into the can was immediately exposed to the sharp edges of the opening. An unusual feature of the push-tab Coors Beer cans was that they had a second, smaller, push-tab at the top as an airflow vent — a convenience that was lost with the switch from can opener to pull-tab. The "push-tab" was introduced into Australia in the early 1980s and was locally known as "pop-tops".