My sister-in-law was here a few months ago and she left some of her insulin syringes (Not used, lol) behind. I tried sucking up some juice with one but the needle was too small and the juice too thick. I pulled the plunger out and dripped 8 drops (the amount that I usually drip in to refill one) and stuck the needle thru the hole in the mouthpiece, angled it and squirted the juice around the side of the carto. Worked great!