An Arnold Palmer is a beverage consisting of iced tea and lemonade, named after American golfer Arnold Palmer. According to Palmer, he was in the habit of drinking ice tea with lemonade at home, and in 1960 at the US Open at the Cherry Hills Country Club in Denver, CO, he ordered the drink at the bar. A woman sitting nearby overheard him, and ordered "that Palmer drink", thus giving the mix its name. The drink is also referred to as a "Half & Half" in many parts of the United States, especially the South.
A John Daly, named after professional golfer John Daly, is a mixed drink made by adding vodka to an Arnold Palmer. Another hard variant, the "Arnold Palmer Hard," replaces the vodka with a malt beverage.
Monster Energy produces a tea/lemonade product that adds stimulants and electrolytes to create an energy drink. The beverage is marketed under its "Monster Rehab" brand.
In Baltimore, Maryland specifically, the "Half & Half" drink can be found in a large majority of carryout restaurants. It is usually served in conjunction with a Parker chicken box.
Mass-produced versions 
The drink was sold under the Arnold Palmer name by Innovative Flavors since 2001, with Palmer's picture and signature on the bottle. Since the mid-2000s, Arizona Beverage Company has handled distribution of the beverage. Arizona sells Arnold Palmer half-and-half in 11.5 and 23 ounce cans, 20, 34, and 42 ounce bottles, and 64 ounce and gallon jugs. Lemonade combined with iced tea is also sold without the Arnold Palmer name by other companies, such as Lipton Brisk, Country Time, Sweet Leaf, XINGtea, Snapple. and Peace Tea (as Caddyshack).