Gift ideas for field instructor

I've received great supervision from my field instructor this year, on a small, close team of child and youth therapists. A lot of the therapists here rag on her for never doing self-care, so I thought I'd get her something to support that. At first I thought of a massage gift certificate, but that got mixed reviewed from colleagues with one saying she'd love that and another saying it might cross a line since massage can be so intimate. Another, similar, idea is just a gift certificate to the spa in our town. I don't mind spending a bit of money (say $75) as she's been a huge help to me this year. Does anyone have some good ideas for me?