Used pesticide containers left unattended may become a contamination, injury, or poisoning hazard so take care of them right away.
Specific instructions appear on each pesticide's label.
Generally, remove by normal use as much of the pesticide as possible. For disposables-Rinse and crush, puncture, or break to make it unuseable unless prohibited by label statements. According to EPA, all pesticide products, including homeowner products, must bear container disposal statements which are specific foreach type of container. Rinse thoroughly before discarding in trash. Then offer for recycling or reconditioning, or puncture and dispose of in a sanitary landfill, or by other procedures approved by state and local authorities.