Have we bought this set to heat up even a mobile warm tea, a milk or a glass can. Whether on long car rides, in the restaurant or at a picnic in the park, the thermos with the hot water is always there. If you have warmed up a bit and the remaining water pours back, you can use them a second time also. But then because of the heat loss, the warm-up takes longer. Boiled water to keep at least the whole day there. Processing is TOP. Color is not optimal for a boy but functional regarded matter.