Grains in old coffee grinder
Grains for a fresh cereal or groats, e.g. Grünkerngrütze (tastes very delicious with vegetable dishes) can be in an old Kaffeemühle schroten (such a hand crank, there are more often at flea markets).
I won such a part in a raffle - yes, I'm never the one who wins the TV or laptop, I always get the tea towels, pens or the grandma coffee grinder.
The part was with me in the basement, until I needed cereal jerk and thought I'll give it a try.
Of course, you can also buy shot, but for the stockpile, the whole grain is better suited and the vitamins are better preserved when you freshly grind the grains.