Outdoor SunJel Booster with Citronella 0.5 Ounce Bottle with Dropper is Made in Milwaukee, WI. SunJel Booster bottle houses enough for 18 Canisters and/or 9 Refill Bottles. Outdoor use only with a 2 Year Shelf Life. Take One Full Dropper and place in SunJel Canister or 2 Full Droppers in SunJel Refill Bottle. Place the lid or cap back on the SunJel Canister or Bottle and Shake...Within 10 seconds, When the SunJel turns Yellow, and then you will know the Citronella Oil is dispersed throughout the can or bottle. For more buggy areas you may want to do an extra dropper in each.