Weck 50 ml glass jar for preserves. The 50 ml Weck glass jar, it is perfect for its size for sweet preserves, such as jams or compotes. But you will not only use them to make preserves, you can also use them to prepare yogurts, present desserts and sauces in individual portions, store food, bake, freeze, etc. Store spices, sauces, jams, individual portions of food, etc. Dehydrated foods can be stored, since they are completely sealed and moisture does not enter, as well as already fermented foods. Bake individual cupcakes, small brownies, coulans in the traditional oven or in the microwave. Transport food.