Kerr 8oz Widemouth Jars w/ Bands & Lids These jars are a favorite for preserving jams and apple butters, spreads and small batches. They are suiteable for hotfill canning, waterbath canning, pressure canning and for freezing! The absence of shoulders in this jar allows for easy filling and easy scooping, dipping of the delicious contents! They also make convenient storage for leftovers and are part of the official Mason Jar Meal starter kit.