In regards to pesticide disposal, the product label of Crossfire states,
 
"PESTICIDE DISPOSAL AND CONTAINER HANDLING: 
Non-refillable container. Do not reuse or refill this container. Clean the container promptly after emptying. 
 
Triple rinse as follows: Empty the remaining contents into application equipment or a mix tank and drain for 10 seconds after the flow begins to drip. Fill the container 1/4 full with water and recap. Shake for 10 seconds. Pour rinsate into application equipment or a mix tank, or store rinsate for later use or disposal. Drain for 10 seconds after the flow begins to drip. Repeat this procedure two more times, then offer for recycling, if available, or puncture and dispose of in a sanitary landfill or by other approved State or local procedures."
 
You will triple rinse your sprayer after disposing of the solution properly.