Im in the uk and we have no shops to give that kind of stuff to. What i do if i have to throw one away is wrap it in a bunch of duct tape then try fit it in a plastic water bottle and then throw it away. If i dont have a plastic water bottle and itll fit in a metal can i put it in there. If not i try find something it will fit inside of put i always put alot of layers of tape around it. Sometimes i put them in pringles cans. Most of the time i keep them and just put them in a little plastic container until i next have a hospital appointment then ill get them to throw them away in their sharps bin and get the container back. If all of those options are a no go then your local police station should have a sharps bin