I had similar experience but for milk. Five years ago when my kids were still young and fed on milk. For a can of milk powder, I used to finish it in four days for two kids. However, when my previous maid came..... You can't image, for the first two weeks, the experience still haunted me, she finished four cans of milk and all my stock was out. I had to drive to the supermarket that very early morning and bought milk powder. It is still a mystery now because the maid was fired by me a month later for stealing. U know what maid is. Even milk power they still not missed it.