I buy my syringes in bulk at Walgreens (100 per box) The new box they gave me today had retractable needles which I have never heard of and I didn't notice until half way through filling a turkey toe with room temperature Masters Blend and the fluid came gushing out the back end all over my table. Had this been a duck it would have soaked it. I took them back and exchanged them with no issue. Please take note. It has a tube inside a tube and at a certain point the inside collapses.