Calvados Brandy

Calvados is a cider brandy from Normandy, France. Calvados is distilled from cider made from specially grown and selected apples, from over 200 named varieties. The fruit is harvested and pressed into a juice that is fermented into a dry cider. It is then distilled into eau de vie. After two years of aging in oak casks, it can be sold as calvados. The longer it is aged, the smoother the drink becomes. Usually, the maturation goes on for several years.

Calvados is different from a Hard Cider which is popular in the British Isles.

a Hard Cider is a bubbly low alcohol beverage that is often mistaken for a beer for it's carbonated nature and is not even a wine since it's fermentatation is not complete and thus it's less alcoholic and mildly sweet (since apple doesn't contain as much sugar as grapes even the semi-fermented beverage doesn't contain as much leftover sugar as a wine at s similar stage would have ) whereas a Calvados is produced by distilling a cider.

"Calvados is the regimental drink of The Queen's Own Rifles of Canada, The Royal Regina Rifles, The Royal Canadian Hussars, Le Régiment de Hull, Le Régiment de Maisonneuve, and The Sherbrooke Hussars. The troops were gifted with Calvados as the units passed through Normandy following the D-Day invasion." - Wikipedia

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.

Sugar

Brown Sugar is a sucrose sugar with a distinctive brown colour from the presence of molasses, it is a partially refined or unrefined sugar containing sugar crystals and residual molasses giving it a distinctive taste and flavour of crystallised molasses or toffee. The taste of dark brown sugar is described as a caramel taste with a deep molasses flavour.
Brown sugar is used in cocktails where a caramel candy or toffee flavour is expected.

Caster Sugar is finely ground granulated sugar. It is not as fine a powdered confectioners' sugar and has a little grit to it. It is somewhere between confectioners' sugar and granulated sugar, and melts in mouth with a mild spicy feel to the tongue

Vanilla Sugar is the regular granulated sugar infused with vanilla flavour, by using vanilla pods and seeds to flavour the sugar. A home made alternative is to use vanilla sticks or pods in a jar of sugar and leave it sealed for 4 weeks to allow the vanilla flavour to infuse. Or to use granulated sugar and vanilla extract and blend in a mixer, although this ends up in powdered sugar.