Single-category machines hit a ceiling the moment the afternoon crowd leaves. This paper puts hard numbers on why a multi-drink terminal earns more per square meter, and why 'just add more machines' fails the math.
In an office of 5,000, a single coffee machine netted ~RMB 32,340/mo at 1.0x yield index; a multi-drink terminal reached ~RMB 61,560/mo at 2.2x. Across three scenario types the yield lift ranged 50%-120%, largest where the user mix was most diverse.
Coffee peaks at 8-11am then fades; milk tea owns 14-17; herbal fills the dead 11-14 and post-17 slots. A multi-drink machine carries all four curves on one footprint, so the same square meter sells all day instead of three hours.
Three single machines cost ~RMB 120k vs. one multi-drink at ~RMB 70k, occupy 4.5 sqm vs. 2 sqm, and require three landlord negotiations. Net profit was nearly identical (~RMB 18k vs ~RMB 17.5k) but capital efficiency of the single terminal was roughly double.
Multi-drink is not 'two machines in one shell'. It needs at least four independent fluid paths (espresso 92-96C, milk-tea 60-70C, juice 2-6C, herbal 85-95C) with separate CIP cleaning to avoid cross-flavor. Fewer than five vendors globally do four independent paths plus independent cleaning.
The yield advantage is not magic; it is daypart arbitrage on a single footprint. Buyers should score a multi-drink machine on independent path count and modularity, because those two factors decide whether the 2.2x holds past year two.