du soda sans sucre, du soda de régime. The most usual way is to use the brand name, as in 'du Coca light' or 'du Pepsi max'.
'soda' (masc.) is spelled the same in French.
J'aime le soda.
You can make a soda bottle rocket.
un biberon
Une bouteille
POPCIClE!!!!!
un soda (masc.)
Bouteille de Cola
The difference between the taste of can soda and bottle soda is in my opinion a can soda has less aside then a bottle soda. In a can soda you taste more aside then in a bottle of soda. A bottle of soda only taste good at when you begin to drink it and if you leave it for an hour later the taste goes away and the soda taste sweet. In a can soda you could leave it in a fridge for an hour and when you finish drinking it taste the same.
err, yes, because: bottle mass + soda mass > bottle mass
"Bouteille de la mort."
well yes it is because the can is lighter than the soda. But understand that as you put the soda i the can /bottle it does get heavier. But more soda can fit in the bottle than the can so that makes the soda bottle heavier than the soda can.