As long as they can't be traced to you, find a place to get rid of them. Public dumpsters wouldn't bother me just be casual about throwing it away without looking conspicous. Or a public gas station or foodmart bin.
Just throw them in your garbage. I don't think there's a need for proper disposal like batteries and stuff. As long as all the regents gone its just a little glass bottle.
Now if your worried about drawing attention toward yourself i don't think you'll have a problem unless you have DEA searching through your garbage cans lol