Does a Pink Gin and Manhattan both contain bitters?
yes
Manhattan (cocktail)
A Manhattan is a cocktail made with whiskey, sweet vermouth, and bitters.
 Commonly used whiskeys include rye (the traditional choice), Canadian whisky, bourbon, blended whiskey, and Tennessee whiskey.
 The cocktail is often stirred and strained into a cocktail glass, where it is garnished with a Maraschino cherry with a stem.
 A Manhattan can also be served on the rocks in a lowball glass.
 The whiskey-based Manhattan is one of five cocktails named for one of New York City's five boroughs, but is perhaps most closely related to the Brooklyn cocktail, a mix utilizing dry vermouth and Maraschino liqueur in place of the Manhattan's sweet vermouth, as well as Amer Picon in place of the Manhattan's traditional bitters.
Pink Gin
Pink Gin or Pink Plymouth is a cocktail made fashionable in England in the mid-19th century, consisting of Plymouth gin and a dash of Angostura bitters, a dark red bitters that makes the whole drink pinkish.
 Lemon rind is also commonly used as a garnish, with the citrus oils subtly complementing the flavour.
Brooklyn (cocktail)
The Brooklyn is one of five cocktails named for the boroughs of New York City, along with the Bronx, the Manhattan, the Queens and the Staten Island Ferry.
 It resembles a Manhattan, but with a specific type of bitters (several types of bitters can be used in a Manhattan) and the addition of Maraschino liqueur.
 It largely fell into obscurity after the end of Prohibition, but experienced a resurgence in the 1990s. Casino (cocktail)
The Casino is an IBA official cocktail made with gin, maraschino liqueur, orange bitters and fresh lemon juice. Derby (cocktail)
The Derby is an IBA Official Cocktail composed of gin, peach bitters and mint leaves. Kräuterlikör
Kräuterlikör ] (herbal liqueur or spiced liqueur, also called "half-bitters") is a type of liqueur that is flavored with herbs or spices and traditionally drunk neat as a digestif.
 In contrast to bitters, they have a higher sugar content, expressed as invert sugar.
 Liqueurs of this kind normally contain 15% to 44% alcohol by volume. Curing salt
Curing salts are used in food preservation to prevent or slow spoilage by bacteria or fungus.
 Generally they are used for pickling meats as part of the process to make sausage or cured meat.
 Curing salts are generally a mixture of table salt and sodium nitrite, which serves to inhibit the growth of bacteria, specifically "Clostridium botulinum" in an effort to prevent botulism, and helps preserve the color of cured meat.
 Many also contain red dye that makes them pink to prevent them from being confused with common table salt.
 Curing salts are not to be confused with Himalayan pink salt, which is pure salt with trace elements that give it a pink color. Angostura bitters
Angostura bitters ( ) is a concentrated bitters, or botanically infused alcoholic mixture, made of water, 44.7% ethanol, gentian, herbs and spices, by House of Angostura in Trinidad and Tobago.
 It is typically used for flavouring beverages or (less often) food.
 The bitters were first produced in the town of Angostura (Ciudad Bolívar, Venezuela) (hence the name), but do not contain angostura bark.
 The bottle is easily recognisable by its distinctive oversized label. Tuxedo (cocktail)
The Tuxedo is an IBA Official Cocktail composed of gin, dry Vermouth, orange bitters, maraschino and Absinthe. Gin pahit
Gin Pahit is an alcoholic drink made with gin and bitters, as enjoyed in colonial Malaya.
 The name means "bitter gin" in Malay.