Like most of you guys, I have accumulated several sets of measuring cups and spoons. There is one complete set of measuring cups in my cupboard and a glass jar container one complete set of measuring spoons plus odds and ends of spoon sets.
I have a 1 cup measuring cup in each the flour, sugar, oatmeal and rice containers. Then the 1/2 cup measuring cups in other things like cornmeal, brown sugar... etc. I find this so convenient. Some of my small measuring spoons 1/8 & 1/4 tsp are in the dry spice containers.
The only cups that I have to fetch are the 1/3, 2/3, 3/4 cups on occasion for these dry ingredients. (I never measure veggies & such in a measuring cup....they don't fit. They need to be used as one med. or weighed....2 lbs green beans....for example)
As for the Rings. who wants to wash a whole set because you measured with one?
If I had to take a set to be used somewhere else, I would mount them on a car key ring where they would not fall off. (actually I'd probably just buy another set and what comes home would wind up in the incomplete misc container)
If I decide to recycle a container to store in, I measure liquid &/or dry to see how much it actually holds.