Acidified products should be bottled hot, at a temperature no lower than 165 degrees. Hot bottling forms a hermetic seal, and the best way to ensure a proper seal is to invert the bottle once it is sealed. Hermetic seals are a little vacuum in the bottle, and do not require hot water bathing. The only way to check product acidity is with a pH meter. Cole-Parmer has a nice one for around $110. If you have additional questions, I'll try to dig through my course work (USDA-certified "acidified foods" course) to answer them. We had to take this course to FDA-certify our hot sauce manufacturing facility (sigh). - -- Robert Farr (540) 668-7160 Check out http://www.chileman.com for ALL Natural Hot Sauce !One of the easiest ways of preserving chillies is in sweet Sherry. It avoids alot of the potential health problems in home bottling Mad King Michael