The amount lost in the bulb would be very minimal especially once the inside gets a small layer of powder on the inside and absorbs any moisture.
A couple things to do would be to line the inside with a non toxic powder such as flour or something to draw out any moisture that may be in the bulb, then keep squeezing until no more flour comes out.
Or you could get a suction syringe(same thing basically) that has a long, detachable, clear plastic or glass applicator that can be cleaned or scraped if necessary. I think if you can suck your dose in slow enough, gravity would prevent the powder from going into the bulb and stay in applicator. You could also preload a straw as first mentioned and fit a bulb over that.
A couple things to do would be to line the inside with a non toxic powder such as flour or something to draw out any moisture that may be in the bulb, then keep squeezing until no more flour comes out.
Or you could get a suction syringe(same thing basically) that has a long, detachable, clear plastic or glass applicator that can be cleaned or scraped if necessary. I think if you can suck your dose in slow enough, gravity would prevent the powder from going into the bulb and stay in applicator. You could also preload a straw as first mentioned and fit a bulb over that.