How to ask about the different appearance of one product?
How to ask about it if I would like to get an answer like this:
It is available in pack of 6 and 12 (in glass bottles) and in pack of 9 and 18 (in drink can).

(Well, maybe my made up answer is not correct, but I hope you understand my intention.)

Question

How to ask about the different appearance of one product?
How to ask about it if I would like to get an answer like this:
It is available in pack of 6 and 12 (in glass bottles) and in pack of 9 and 18 (in drink can).

(Well, maybe my made up answer is not correct, but I hope you understand my intention.)

Answer

Thank you!

Answer

The question would be:  Is it available in a pack of 6?  Or how many bottles in a pack?

Answer

Thank you, for the correction, but I would like to know how to form a question to get this sentence as answer.

Answer

You are nearly correct. Just missing the indefinite article 'a'.  So, in 'a' pack of 6 and 12.