Yes, the noun 'bottle' is a countable noun, the plural form is bottles.
Example: There were three bottles on the tray, one bottle of Ginger Ale and two bottles of cherry cola.
First, "vitamin C" is two words, not one word. And second, it is not countable. If you were referring to vitamin C tablets, for instance, those would be countable (for instance there might be 100 in a bottle). But "vitamin C" itself can be measured (for example, in milligrams) but not counted.
countable
countable
The noun 'hill' is a countable noun. The plural form is 'hills'.
cookies are countable unless you have brain problems
'Milk' is is considered to be an 'uncountable' noun, and, as such, has no plural.Bottles, on the other hand, are countable. Try it! One bottle, two bottles etc!And you can have two bottles of milk. But it is the bottles that are countable, not the milk inside. Just try counting milk! Impossible!
countable
Shark is a countable noun.
Duck as an animal is countable, but if you mean the meat it is uncountable.
Prawn - prawns is the plural - is a countable noun
few is countable
countable