I have gamma seals for every type of bucket I have: sugar, each type of grain, each type of bean, etc. I have 2-3 buckets of each, so I only need one per type. This is about 20 different types of stuff being stored (hey - I do not want to get bored of black beans and rice, okay?) Unfortunately, gamma seals only come in 6 colors. soooo.......
I have mixed them up. All my beans/legumes have a blue ring, and the screw one/off lid part is different - black for black beans, white for white, yellow for lentils, red for kidney, orange of pinto, etc. All of my flours have black bases, my whole grains have red or yellow bases and my rices have orange bases. That way I can see at a glance which bucket I want to open instead of twisting the bucket this way and that trying to read the label on the side.
I keep my "open" buckets in one room of the house with the rest of my food storage items (used often "pantry" items) and the sealed buckets in another room where it is cooler (and more storage space!).
My mylar bag stored food will probably not be opened for rotation until I have rotated everything else a few times.