Kilner Wide Mouth Preserve Jar - 500ml. A convenient wide-mouth glass food storage jar for preserving whole fruits and vegetables as well as your fave preserves, jams and jellies. Jars are dishwasher safe, bands should be handwashed and discs are single-use. Replacement bands and lids are available. 500ml. 500ml wide mouth preserving jar. Built to last. Unique pressure seal lid. Easy to use metal screw top band. Vacuum seal screw band and seal discs are replaceable. Perfect for homemade preserves, jams and jellies. Jars are dishwasher safe, screw bands should be washed in warm water, vacuum discs should be used only once.