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0:00 Introduction 0:48 The differences between twist-off jars and screw-top jars with a normal thread 1:33 How a TO closure works 2:28 My lids are spinning and won't stay on. What am I doing wrong? 4:26 Details on different seals for different contents and temperatures 7:26 Oily contents need a different seal than other filling materials 9:13 The different shapes of lids: stackable, button and deep lids When it comes to preserving jam and other delicacies, so-called twist-off jars and the corresponding closures are standard. However, many people are not aware that a twist-off closure is not a normal screw closure. So they treat it like a screw closure and are then surprised that the result does not meet their expectations. In this video I tell you everything there is to know about twist-off (TO) closures. What the special features are, what different TO closures there are, how to use them correctly and which closure is best used on which occasions.