Jam Jars

I have issues with jam jars. The standard practise is to get jam out of jars through the use of butter knives, or in some cases, a spoon. The jam jar is made of glass. The knife or spoon is made of metal. Jam jars come in all shapes and sizes, so do knives and spoons. All of this means that it proves very difficult to get the last of the jam out of the jar. It just doesn't work. I wind up getting frustrated and wasting valuable jam when I rinse the jar. A spatula would probably work quite well, since flexibility and malleability are of importance in this situation. The problem is, though, that I do not own a spatula small enough to fit into the jam jar. I know that they exist, but I don't own one. I can't see the use, other than for getting the last jam out of the jar. It seems a little wasteful to own a tool whose only use is to get the last jam out of the jar. Although who knows, that may be less wasteful than having to constantly waste jam.