To get a screw top jar is very easy: They just come to you. If you buy mixed pickles, fruit puree, yoghurt, pesto, smoothies or blue kraut (is this even the correct English word?), you get one free. Rinse them carefully, let them dry, storage them at a clean place (and don’t put the lid on again while they are not used). I put nearly everything in glasses: food, presents, … even my paperclips and ear plugs are stored in glasses. If you are gifted with creativity you can also turn the jars into little masterpieces like plant pots or lanterns.