Toland Home Garden Small Blueberry Blue Pesticide-Free 3.75-Inch Diameter Glass Wasp and Fruit Fly Trap 10203 Simply remove the cork, tilt it, add juice or meat, place the cork back in the top, and hang it up outside or set it on atabletop and walk away Wasps in different regions have different preferences for bait - test them all! Check it daily to see if the trap needs cleaning and resetting Fruit Flies can be caught with this trap using apple cider vinegar with just a touch of dish soap when hung over your sink or placed on your counter. Beneficial bees won't be harmed and will be protected from harmful wasps by reducing or eliminating their presence from areas near your traps This pesticide-free trap has a diameter of 3.75" and hasreplacement corks (SKU# 959010) available for purchase