With its durability and lightness, aluminum can is one of the most preferred packages types for carbonated soft drinks. It establishes complete can facilities for producers, starting from product preparation to palletizing, with syrup room systems and process technologies included.

The flavour base or syrup.
This can be as simple as lemon juice and sugar (for lemonade) or as complicated as 30+ ingredients in some cola recipes.
On a home basis if there is a flavour that you like, but need to extract from something solid (like ginger, chillis, vegetables, herbs etc) then there are a couple of methods.
Juice it. For something like ginger the you can grate it then put it in a muslin cloth (cheesecloth) and squeeze the cloth 'til all the fluid comes out. Ginger will be approximately 50% by mass as ginger juice. Other vegetables can be macerated in a juicer (don't do this with citrus fruit - it's unpleasant to say the least), likewise some herbs.

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