Title: Drink can
Content:  he came up with the pull tab. Pull-tab cans, or the discarded tabs from them, were colloquially called "pop-tops". Into the 1970s the pull-tab was widely popular, but its popularity came with the problem of people frequently simply discarding the pull-tabs on the ground, creating a potential injury risk especially to the feet or fingers. The problem of the discarded tops was 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 aluminum blister was 
Title: Drink can
Content:   Mikolaj Kondakow and James Wong of Thunder Bay, Ontario, Canada invented the pull tab version for bottles in or before 1951 (Canadian patent 476789). In 1962, Ermal Cleon Fraze (1913–1989) of Dayton, Ohio, United States, invented the similar integral rivet and pull-tab version (also known as ring pull in British English), which had a ring attached at the rivet for pulling, and which would come off completely to be discarded. He received US Patent No. 3,349,949 for his pull-top can design in 1963 and licensed his invention to Alcoa and Pittsburgh Brewing Company, the latter of which first introduced the design on Iron City Beer cans. The first soft drinks to be sold in all-aluminum cans were R.C. Cola and Diet-Rite Cola, both made by the Royal Crown Cola company, in 1964. The early pull-tabs detached easily. In 1976, the Journal of the American Medical Association noted cases of children ingesting pull-tabs that had broken off and dropped into the can. Full-top pull-tabs were also used in some oil cans and are currently used in some soup, pet food, tennis ball, nuts, and other cans.
Title: Drink can
Content:  "pop-tops". The safety and litter problems were eventually solved later in the 1970s with Daniel F. Cudzik's invention of the non-removing "Stay-Tab". The pull-ring was replaced with an aluminum lever, and the removable tab was replaced with a pre-scored oval tab that functioned similarly to the push-tab, but the raised blister was no longer needed, as the riveted lever would now do the job of pushing the tab open and into the interior of the can. Cans are usually in sealed paperboard cartons, corrugated fiberboard boxes, or trays covered with plastic film. The entire distribution system and packaging need to be controlled to ensure freshness.
Title: Drink can
Content:   In 1975, Daniel F. Cudzik, an engineer with Reynolds Metals, filed a design patent application for an "End closure for a container". This later became known as a "Sta-Tab". When the Sta-Tab launched in 1975, on Falls City beer and, quickly, other drinks, there was an initial period of consumer testing and education. Cudzik later received patents for this "Easy Open Wall". The validity of these patents was upheld in subsequent litigation. The similarly designed "Easy-open ecology end" was invented by Ermal Fraze and Omar Brown. Its patent application was also filed in 1975. This design, like Cudzik's, uses a separate tab attached to the upper surface as a lever to depress a scored part of the lid, which folds underneath the top of the can and out of the way of the resulting opening, thus reducing injuries and roadside litter caused by removable tabs. Such "retained ring-pull" cans supplanted pull-off tabs in the United Kingdom in 1989 for soft drinks and 1990 for alcoholic drinks.
Title: Drink can
Content:  down into the can using one finger. A small unscored section of the tab prevented it from detaching and falling into the can after being pushed in. 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. A feature of the push-tab Coors Beer cans was that they had a second, smaller, push-tab at the top as an airflow vent. "Push-tabs" were introduced into Australia in the early 1980s and were locally known 
Title: Drink can
Content:  One variation was the press button can, which featured two pre-cut buttons—one small and one large—in the top of the can sealed with a plastic membrane. These buttons were held closed by the outward pressure of the carbonated drink. The consumer would open the can by depressing both buttons, which would result in two holes. The small hole would act as a vent to relieve internal pressure so the larger button could then be pressed down to create the hole used for consuming the drink. Consumers could also easily cut themselves on the edges of the holes or get their fingers stuck. Press button cans were used by Pepsi in Canada from the 1970s to 1980s and Coors in the 1970s. They have since been replaced with pull tabs. Used in Australia, locally known as "pop-tops", for soft drinks during the early 1980s. However, Heineken Brewery did bring back press- or push button cans on the market in Europe as a short lived marketing strategy in the 1990s.
Title: Ermal C. Fraze
Content:  opener. His first design included a lever that pierced a hole in the top of the can, but this caused a safety hazard as it produced sharp edges that could cut the user's finger. Later that year, he established a mechanism known as the "pull-tab" can, with its users simply being required to pull a removable tab to open the drink. He received U.S. patent No. 3,349,949 for the invention in 1963, and subsequently sold it to Alcoa. By 1965, around 75% of U.S. breweries were using them, but in the mid-1970s, pressure from environmentalists due to litter led to the development of the non-removable tabs used today. By 1980, his company was supplying can-end machinery worldwide making over $500 million in annual revenue.
Title: Drink can
Content:   Early metal drink cans had no tabs; they were opened by a can-piercer or churchkey, a device resembling a bottle opener with a sharp point. The can was opened by punching two triangular holes in the lid—a large one for drinking, and a second smaller one to admit air. As early as 1922, inventors were applying for patents on cans with tab tops, but the technology of the time made these inventions impractical. Later advancements saw the ends of the can made out of aluminum instead of steel. In 1959, Ermal Fraze devised a can-opening method that would come to dominate the canned drink market. 
Title: Beverage can printing
Content:  The first beer sold in a can was in 1935, when a brewery in the United States inquired American Can Company about the possibility of packaging their beer in cans. In 1931, American Can Company began to experiment with the possibility of canned beer as they anticipated that the Prohibition period would soon end. The major obstacle in producing beer cans was that no current cans could withstand the excess pressure that was required in packaging beer. Two years later, American Can company successfully designed a coating that would prevent the beer from reacting with the tinplate cans. Now that they developed a successful beer can, American Can Company had to pitch their innovation to breweries. While large breweries were skeptical of the unproven packaging method, the Gottfried 
Title: History of bottle recycling in the United States
Content:  The deposit system and returnable bottles started to get replaced by nonreturnable containers. The beer industry was the first to switch to non-returnable containers, which proved difficult at first, because pressure in the can could not release and the metal changed the taste. The first firm to successfully introduce cans was the Gottfried Krueger Brewing Company of Newark, New Jersey in 1935. Since the 12-ounce cans were much smaller and lighter than glass bottles, they could more easily be packaged and transported. However, bottlers soon started selling "one-way" bottles as well. Now, bottles and cans did not have a brand logo anymore, but an engravement that said: "No Deposit, No Return". In the early 1950s, 

Question: when did they stop making pull tabs on beer cans?
Answer: 1990.
1970s.