Weck 80 ml glass jar for preserves. The 80 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. Freeze: in this case, as in any other jar, we must be careful to leave a little free space to avoid breakage when the food expands when frozen. It is advisable to avoid sudden changes in temperature: if we have put the hot food in the jar, we must let it cool before putting it in the freezer. Transport food. We don't need lunch boxes, the jar is the perfect container.