I have the Reer Thermosbox bought for my daughter to can quickly and easily offer a hot meal while traveling. This worked well and the box kept the food acceptable warm. After a few weeks use I noticed an unpleasant smell but firmly, although the box was always immediately thoroughly rinsed with the hand after use and dried open. The reason is that the black plastic lid is screwed onto a black plastic ring which is firmly attached to the aluminum containers. But soups and sauces to flow under the edge of this ring, which can not be removed and is not connected so tightly to the aluminum that no fluids could penetrate. You can see the box so do not properly clean and I was eventually to unhygienic and I threw the miefende box in the trash.
