Step 1: You will need the following:
Step 2: Measure about 2 inches up from the bottom of the pop bottle and draw a line around the circumference of the bottle.
Step 3: Use scissors to cut around the line you marked to cut the bottom of the pop bottle. Don’t cut yourself!!
Step 4: Fill your bucket about 90% full with water.
Step 5: Pack some herb in your one-hitter or Herb Bowl. If you are using an Herb Bowl twist and push it onto the one-hitter to attach it to your Knockout. Remove the bottom stainless steel straight tube and silicone connector piece.
Step 6: Attach your Knockout to the opening of the pop bottle.
Step 7: Put your thumb into the mouthpiece so no air can pass through.
Step 8: Submerge the pop bottle with Knockout attached into the bucket so that the stainless steel tube is just above the top of the water.
Step 9: With thumb securely in the mouthpiece, slowly pull Knockout and pop bottle upwards while lighting the Herb Bowl. Smoke will gradually ripple onto the surface of the water and fill the pop bottle.
Step 10: Once the bottle is filled with enough smoke remove your thumb from the mouthpiece, remove the Herb Bowl (if you used it) and then inhale through the mouthpiece while slowly pushing the pop bottle back down to the level it started at, keeping the stainless steel tube above the water.
The video below shows how to do a Bucket with the Knockout: