Alternatively: "podczas" breaks into "pod czas", ie, "under the time" or "under the period". Note that "lunch" is in the genitive, so I think this translated literally as "under the time of lunch, we drink wine".

I actually do like listening to podcasts while I do things so this helps.

obiadu is genitive because podczas needs genitive wino here is accusative (genitive would be wina), you need accusative after pić

@alukasiak put together this:

https://www.clozemaster.com/blog/wp-content/uploads/2017/10/Most-used-Polish-prepositions.png

'at lunchtime' is just... a time. It doesn't guarantee that you actually eat your lunch then, only that people generally do it at that time. A Polish equivalent is "w porze obiadu". And here you definitely eat lunch and drink wine at the same time.

"na przerwie" (Locative)