Lemon Juice

Lemon Juice being rich in Vitamin C is an excellent remedy for sore throat and aids in digestion and controls blood sugar, and also promoted weight loss. It is used for various culinary and non-culinary purposes all over the world. Lemon juice is known to reduce or even reverse the effects of excessive alcohol consumption and intoxication.
In drink mixing, fresh lemon juice brings a tangy zing to so many classic drinks and in fact, it's the most used ingredient in drink mixing other than the liquors of course.

Vodka

Vodka is an European clear distilled alcoholic drink that has been one of the most popular drinks across the world .

You'll find it to be the most popular spirit in drink making because of it's neutral taste and absence of flavour and colour.

Vodka often replaces Gin in many traditional cocktails

Vodka is known to be good for the heart, and if consumed in moderation, can prove to be good for cardiovascular health

Note that these days there are flavoured Vodka available in the market too, and some cocktails do make use of them.

Pineapple Juice

Rich in antioxidants, this juice pressed from the pulp of the Pineapple is a good protection against cell degeneration, It contains bromelain, a group of enzymes known to reduce inflammation, improve digestion and boost immunity. In drink mixing, there is nothing like the tropical flavour of pineapple juice to add that tropical freshness and nuance to a cocktail.

In drink mixing pineapple having a fruity tropical aroma pineapple juice is a good companion for tropical fruits such as mango, banana, passion fruit, and also pairs well with oranges and grapefruit juice.

Pineapple juice is the juice pressed out of the pulp of the pineapple fruit, several varieties of pineapple are used to manufacture commercial pineapple juice. High on Vitamin C and enzymes that have been shown to activate healthy immune response, it’s a good juice to start a day. The enzyme bromelain in pineapple juice, triggers analgesic response in the body to fight pain and reduce swelling. In cocktails, Pineapple juice goes best with Vodka and is often a regular juice in many Vodka cocktails.

St. Germain Elderflower Liqueur

A liqueur is an alcoholic beverage made mostly from rectified neutral spirits flavoured with sugar, fruits, herbs and spices. Liqueurs are often served as aperitif or digestif or used as bitters, and some are ceremonial or have regional cultural significance.
Most liqueur recipes that date back to the medieval or early modern era tend to have secret recipes and legends following them trough centuries. Liqueurs mostly began in the laboratories of pharmacists as medicines or at homes as ways of preserving seasonal fruits, or were created by monks in their monasteries. and then took off as fragrant, flavourful liqueurs, either filtered to be clear or cloudy.
Liqueurs are created by infusing or macerating fruits and herbs in neutral grain spirit, brandy base like cognac, rum, vodka or even whisky and then filtering the infused alcohol to produce the unique sweet beverage.