My kit came with four devices. Chlorine and pH are tested in the same container - one side for chlorine and the other side for pH.

The TA test and calcium hardness tests are performed in a different container - looks like a tall shot glass with ml measurements 5mL to 25mL - no top.

The CYA test involves using two containers - one for mixing the chemicals and when the solution is cloudy, pouring it into a very slender tube with a black dot that is supposed to disappear when viewed from the top and the tube is then read at liquid level.