Konges Slojd 3-pack lunch box cooling elements lemon

How useful are these Konges Slojd 3-pack lunch box cooling elements lemon? With these three nice cooling elements in the shape of a lemon you can keep the contents of your lunch box nice and cool.

Put the cooling elements in the freezer to let them get cold. After cooling for 5 hours, remove them from the freezer and put them in your lunch box or backpack. The gel in the cooling elements is frozen and thaws slowly.

Take the cooling elements for your lunch box with you on a day out, to work or to school. This way you ensure that your fruit, bread or salad stays at a nice temperature.