The luxury glass preserving jar with traditional Kilner styling feature a very easy to use metal screw top lid made up of 2 pieces, a replaceable vacuum seal and a metal screw band to secure the seal|The screw band can be re-used up to 10 times but the vacuum seal is not re-usable and will need to be replaced after each use|Preserving is both an economic and environmentally friendly way to maximise your fruit and vegetable over stocks and provided you follow the instructions, the jars will prove indispensable