These timeless preserving jars with classic Kilner design feature an easy-twist metal lid made up of 2 pieces, a replaceable vacuum seal and metal screw band to secure the seal. The screw band can be re-used up to 10 times, though the seal needs replacing after each use. They're a great way to make the most of fruit and vegetable surpluses and, provided you follow the instructions, the jars will prove indispensable. Each glass jar holds 250 ml, perfect for storing small batches of homemade jam, pickles or other preserves.