Hobnail glass wasp trap, green/blue/purple - large.. During the summer time, wasps can ruin the mood outside when there are sweet things involved. This glass wasp trap will make that a thing of the past. Fill the glass jar with lemonade or vinegar to lure the wasps to the trap. Because of its construction wasps can get in, but they cannot get out. Place the trap at a distance of 10 m (32.8 ft.) to keep the wasps away from you. his wasp trap should be placed on an even surface like a table or hung from the metal loop at the top. Assortment of 3 colours (green, blue or purple). Easy to clean and fill