I have a septic system so never throw nic down the drain. If you or someone you know has landscaping they maintain, a garden or house plants and don't want to use dangerous pesticides because they have pets or wildlife, then give them your loosers. Nictoine, natural pesticides, are more expensive than the regular ones so they'll appreciate it. Its not really important to get strengths "right" but if they're concerned, there are lots of places on the net they can get recipes from. When I smoked, I just threw my butts in a can until the water turned dark brown and used that on plants. Its not a poison per se, as in kill-on-the-spot, and why its safer around pets. It just gives the bugs such bad trots they can't mate.