Grand Marnier

Grand Marnier is a French liqueur brand. Their most well known product is Grand MarnierCordon Rouge, an Orange flavoured liqueur created by Alexander Marnier Lapostolle in 1880.
It is made from a blend of Cognac brandy, distilled essence of bitter orange and sugar. It is 40% ABV or 80 proof in USA.

Grand Marnier is a French Brand of liqueurs. The most well-known product is the Grand Marnier Cordon Rouge, an orange flavoured liqueur made from a blend of Cognac, brandy, distilled essence of bitter Orange and sugar. The Cordon Rouge was created in 1880 by Alexander Marnier-Lapostolle. It has 40% ABV.
Grand Mariner is full of rich, complex flavours and intrigues of the Cognac, and makes cocktails taste. A Grand Mariner is a blend of Cognac and Triple Sec, it's not a traditional Curacao, it's a similar orange liqueur.

Kahlua

Kahlua is a Coffee liqueur is a liqueur produced by steeping roasted coffee, sugar and other ingredients in neutral spirit. The most famous coffee liqueur brands are Kahlua and Tia Maria, Kahlua has been made in Mexico since 1936. Kahlua has a thick buttery taste

Typical ingredients of coffee liqueur include liquor, espresso coffee, roasted coffee bean (and powder), sugar, and vanilla syrup.

The characteristic flavor of coffee along with over a couple of hundreds compounds contribute to the taste of coffee liqueur. Caffeine is a major ingredient of coffee, and also might be a taste factor that influences the complex flavour profile that appeal to coffee liqueur drinkers' palate. Reference - International Journal of Engineering & Advanced Technology (IJEAT)

NOTE: In the absence of a Coffee Liqueur like Kahlua or Tia Maria, to make cocktails with Coffee Liqueur, Coffee Liqueur Syrup can be used as a substitute with the proportionate alcohol substituted with a triple distilled neutral Vodka.

Baileys Irish Cream

Bailey's Irish Cream is an Irish cream liqueur, a liqueur is an alcoholic drink made of distilled spirits and flavorings such as sugar, fruits, herbs, and spices. They can be rightfully christened as the descendants of herbal medicine. The Bailey's Irish Cream is a sweet, cream and cocoa flavoured thick liqueur with Irish Whiskey being the base alcohol and is one of the most popular liqueurs used in cocktail creation.

Ice

Ice is so obvious in most drinks, be it a straight drink or a mixed drink, that we often forget it's importance or even reason behind using a crystal clear good quality ice in a glass of whisky, or crushed ice in a tall glass to enjoy a cocktail.

Ice tempers a hard liquor, and as is in the case of whisky for example, if you prefer the flavours of whisky reach your nose without the hard note of spirit lingering around, or want to avoid the mild sting of a neat whisky, a cube of ice mellows the strength down a little and as it melts slowly, the aroma and flavour is released from the whisky slowly and makes whisky progressively weak, lingering and palatable.

Ice in Vodka helps release the little flavour a Vodka has, slowly, instead of letting the Vodka hit your nose all at once,

In mixed drinks, ice plays an important role in creating the perfect temperature a certain drink requires and bartenders use ice in several different ways, crushed ice for long drinks that will allow the cocktail to slowly water down like a Mint Julep, Moscow Mule, Rum Swizzle, Sherry Cobbler and other Tiki drinks, a large block or cubes of ice for drinks that are spirit heavy, such as the Old Fashioned, Negroni, and Manhattan