LOL I have temped in a UK orange juice factory. Believe me your sanity depends on what you dont know.

As for fruit juice and sugar. My comment makes things look more all juice then I intended.

We tend to sell a few different forms. Pure Juice tends to come in cardboard (plastic coated) tubs of a litre or more. Pure is literal in the name. So no added sugar. It also need to be refrigerated and only lasts weeks. But honestly nattural juice has a sugar called fructos that works pretty well on low blood sugar. Way higher in actual carb grams then modern sodas like coke. But way less then the old pre tax amount.

We also have Juices made from concentrated juice with water and sugar added. During the concentration process it is heated to remove most of the water. Then shipped to factories. Here purified boiled water ands sugar is added.

This leads to a juice that can sit on a shelf without refrigeration for years. Both will work when grabbed in a hurry. But as the reconstituted from concentrate juices have from 8 to 12g of sugar carbs per 100 ml you tend to need less. Making it actually better to carry on a summer day. Old coke full sugar was about the same.

Modern cola is about 4 to 5g per 100ml. Although I have just discovered Coke has started selling Coke Original Taste Brand with 10.6g per 100ml. So looks like they have decided people will pay a bit more after all.

In sainsbury's it £5.20 for 8 330ml cans where Diet coke is £4.99 so the tax is far from huge.