For 2 individuals, 2 units of something. If they might feel obliged to share with the office, then something divisible and all non-perishible.

So 2 bottles of wine vs. a gift basket.

For individuals: wine, gift cards, baked goods or something else that’s an artisinal good made by a professional and sealed. Maybe flowers if you think they might be into that.

For anything likely to be shared with an office: candy or chocolate, fruit or gift basket, assorted baked goods (maybe arranged with a receptionist for their peace of mind).