Vermiculite is here, at last!
The earthenware pots (not glazed, natural) are: 2.3 inches wide for 2.3 inches height the smallest; 3.5 inches wide for 3 inches hight the biggest. Both have a hole in the bottom. Earthenware is transpirant. But usually it helps in understanding if the soil is dry or not, since it's humid the pot too and it's darker in color.
Shoul I spray vermiculite instead of pouring water over it?
If the pots don't fit, in your opinion, I can see what I have here at home, I put apart several plastic containers.
(The little statue it's me thinking!!)