Oxygen Builder related: ordering posts by relationship order

Hi,

Case: I have a website which has drinks to show and I would like it so that they can be added to a sort of route to follow, so that you start with a specific drink, then the next etc. The order can be chosen in the backend by adding them to a route. And you also can choose a couple (not all) of the drinks.

At this moment, this works by using Relationships and choosing the drinks in the route. But now I would like it so that it keeps the order in which the items are being added, how would I achieve this?

I'm using Oxygen Builder to make the query.

Thanks!