Hello,
I have a suggestion, it's a little tricky, so follow me step by step :
1. Create 6 Characteristics, like first bottle, second bottle and so on, until 6.
2. In each of this variants create your 3 value A,B & C
3. Fill your description product with details each A,B & C with different flavor or else (in order to inform the customer on the 6 package product page).
4. Define your characteristic display with dropdown, that will be more clear and user-friendly.
You have what you required, the point is that in any case your customer have to select 6 times (for each bottle space).
Hope this can help you to progress on your subject.
Regards