I buy CA in large bottles and use a single-use pipette to apply. In my shop I just squirt a bit into a plastic drink cup, then into the pipette from there. Throw out the excess. For piano work I think I'd want a small screwtop to carry with me and refresh it at intervals. When you buy it 16 oz at a time, using every last bit isn't even a thought and the larger quantity stays good much longer than those little bottles.