Select clear glass tapered preserve jars with white metal lug caps for housing a variety of spreads, jams, and more. The white metal lug caps include plastisol liners, which form a hermetic seal during standard canning procedures. The wide mouth preserve jars feature a sturdy base that broadens to a wide opening that offers convenient access with a spoon or knife. Be sure to test your canning method with these wide mouth preserve jars and metal lug caps to ensure complete compatibility.