Automatic adding of items

Hello everyone, I have the following problem and can’t find a solution for it, so I’ll try it here.
I have the requirement that I want to sell several items together, for example a bottle of COLA and the empties. adding the empties should happen automatically when I select COLA. I tried with product bundle but the problem is that I can’t manage all items by stock and I don’t know how to add an item automatically in ERPNext when I select another item.

I am happy if I get a solution from you. Thanks :wink:

What’s have you tried? and what help in the right direction do you want?

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