These 8 oz clear PET plastic Tuscany jars with lids and protection seals are single wall jars. They're called "single wall jars" to distinguish them from the 2-piece double wall jars. They are made of polyethylene terephthalate and are semi-rigid and very light-weight. They have high clarity, are strong, have unbreakable impact-resistance, and good chemical resistance.
I use these for packaging my bath salts and body cream. They work very well.
