Karen and ChDs, Wasp freeze $8, is at this site: http://www.bugspray.com/catalog/products/page29.html I've never used it, but I'll bet it's just a can of propane gas. A twenty pound (barbeque size) propane can with an evacuation hose attached would provide enough gas (boils at 40 below zero, approx) to freeze wasps, hornets, neighbors, horses ... and a refill is only 7 bucks. Once out of pressure container, the temp of propane drops to its boiling point. Easy to freeze your own skin if it gets on you in any appreciable amount. Gareth