Questions & Answers about Vi köper kaffe åt våra gäster.
Swedish treats kaffe as a mass noun here, so it appears without an article in the indefinite singular. You use:
- kaffe for coffee in general or an unspecified amount.
- kaffet for a specific, known coffee (the coffee).
- In cafés, you may hear en kaffe to mean “a coffee (a cup).” That’s an ellipsis for en kopp kaffe and is fine in casual speech.
- åt: beneficiary/on someone’s behalf. With köpa, it’s very common: köpa något åt någon (buy something for someone).
- till: direction/recipient. Also common with köpa when you plan to give/serve the item: köpa kaffe till gästerna.
- för: reason, price, or “for the sake of,” not the typical beneficiary with köpa.
- Price: Vi köper kaffe för 50 kronor.
- Sake/reason: Vi köper kaffe för våra gästers skull.
In many contexts åt and till overlap with köpa; för usually does not.