The 290 ml Weck glass bottle is perfect for making preserves with your favorite homemade sauces, but you can also use it to store fruit or vegetable juices, smoothies, vegetable milks, iced teas, etc. or to take them away from home, store or freeze soups, etc. Weck bottles have a multitude of uses and are of high quality (so they can be both sterilized and frozen ) and perfectly meet our requirement for totally safe materials. The characteristics that differentiate the Weck canning bottle Versatility: This is the best bottle for canning, but it also has many other uses: Store any type of drink (juices, smoothies, vegetable milks, infusions, soups, etc.). 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 (soups or creams without danger of spilling). We don't need lunch boxes, the jar is the perfect container The safest preserves: these are the most reliable preserve bottles with their hermetic self-sealing system, since in case the preserve loses its vacuum, we will realize it very easily. Practical: Weck bottles are closed by means of two staples, which offers us the following advantages: The lid can be completely separated, for better cleaning and handling. Wide mouth, they are easier to fill. The food is only in contact with the glass, a totally safe material that does not transmit any toxins to the food. Flexible lids are also available if we prefer to use them instead of the glass lid. Premium materials: all materials are safe from the point of view of toxicity. The glass of the Weck jars is pure stressed glass, of high resistance. In its composition there is no additive or chemical compound. This glass can assume temperatures from -40ºC to +300ºC, allowing both sterilization by boiling, heating in microwaves, in the oven and it also admits freezing. The glass resists a thermal shock of 50ºC difference, that is, sudden changes in temperature should not exceed 50ºC It is recommended to use it to preserve any type of sauces, purees, or preserves; juices, smoothies among others. They allow both sterilization and freezing.