Hello, first of all I wanted to apologize for the delay, I am going to present my different concepts.
FIRST SKETCH

Fig. 1: Sketch 1
This concept is a spice dispenser. It is made using a metal sheet and we have two formats: the base, and on top of it, more are stacked on top as we can see in the figure above. As we see in figure 1, each piece has a part that extrudes at the bottom so that it can engage with the upper part of another piece. The shape that it has is designed to make it easy to fill the dispenser with spices and so that it has a small inertia and this makes the spice come out without a problem. The spices are filled through the top lid that slides along rails. The lid slides until it reaches the horizontal area of the object. The dispenser mechanism is inspired by the water bottles seen on the right of figure 1. It is a very simple mechanism that works this way: it is closed all the time, but if we press down on the part that comes out from the piece, this piece is attached to another part inside in such a way that at the same time it would rise and could let out the amount that the user desires.
It is an option that for adults has no complications in operation.
SECOND SKETCH

Fig 2: Sketch 2
This idea is more focused on aesthetic design rather than functional design. It is made of plastic and is structured by 3 different main components. We start at the base; as we can see, it is a cylinder with a vertical stick extruded from its center. This base is designed so that the user can hold that part and rotate the entire object from this point so the user is able to access all the spices. The stick that sticks out of this base has a “male-female” mechanism so that it can be joined with the next piece. The piece that follows is made of transparent plastic and is shaped like a prism but ends in a point (in the center of the base), from this piece stands out the dispenser that we have previously explained how it worked. Above this last part we have a dome that makes it easy to open and close to fill the spices, also made of transparent plastic.
THIRD SKECTH

Fig 3: Sketch 3
In this last design we can see a “set of boxes” that are made of metal sheets. This object is created by three different sizes of boxes and they are interconnected with rails. How it works is, we have a lid that, through small hinges, is raised up to 90º as we can see in figure 3. We can see that at the height of the lid, we have a part that holds a spoon with which the user will ration. the amount of spices you want. The lid opens through an extrude that the user pulls.
I love your plan two! I think your plan two is a perfect upgrade from plan one. It solves both the problem of storage and the problem of use. This is my understanding: the spice box has only one exit, like the cartridge of a revolver, and when you need to use a spice, you move it to the exit, and then you turn on a switch like a faucet, and the spice is poured out and used, right?
As for plan 3, I think it is a good way, but it may be too big for the family. You know China has a Chinese medicine cabinet, which is basically the same as this one, but its size is not suitable for the family.