That depends on where you are:
It takes approximately 25 empty cans of coke to equal one kilogram in weight.
yes. you should empty the coke bottle first
Nothing, there's no beverage in it. No one really wants an empty can.
It would depend on the size and weight of the coke cans, but on average, you could expect around 40-50 empty standard 12-ounce coke cans to weigh about 1 kilogram.
rock is much more dense than foam. It's like a full bottle of coke weiging more than an empty bottle of coke.
In the early 1980's I remember Coke running a special in the summer. A 16 oz glass bottle was 25 cents. There was a 10 cent deposit on the bottle, so you had to bring in an empty or the Coke cost 35 cents.
Well, you could get something bendy like really big plastic that can fit you. Then get empty coke cans or bottles and glue them on with a hot glue gun. That might not sound like a coke bottle, but it's close. Also, you could flatten lots of empty coke cans, then add them together but do the top and bottom with cardboard so you do not cut yourself with anything pointy.
The same as regular Coke.
This would depend on how much one can of coke costs.
put a pin in it
depends how much coke is in it.
Diet Coke uses artificial sweeteners.