This is a bit more difficult when bottling as opposed to kegging, but it can be done:
A french press will work for hop tea. I'd keep the temperature between 170° & 180°F.
Queue up three or four glasses of equal amounts of beer (125 ml each or something). Then use a syringe or pipette to put a milliliter or two of hop tea in the first cup and adjust up or down from there for the remaining samples (1ml, 2ml, 3ml would work for side-by-side comparison).
Pick the one that tastes the best, and then you can multiply how much hop tea you need for the remaining beer. I'd probably put the tea in the bottling bucket first so it mixes thoroughly.
Hopefully that makes sense?