Are Miracle Whip jars safe for canning?

Miracle Whip jars are not safe for canning because they are not made of canning-grade glass. Canning-grade glass is made of a specific type of glass that can withstand the high temperatures and pressures of the canning process. Miracle Whip jars are made of a different type of glass that is not as strong and could shatter during the canning process. This could result in serious injuries and food spoilage.