This is the most inexpensive clear container on the market. It is mostly used in Taiwan for mass production Phalaeonpsis. They are very thin walled, but are great for those who have lots of repotting to be done and are on a budget. They only come in two sizes, 3" and 4". See photos with ruler for reference. They have a single drain hole on the bottom, so they hold moisture well. We have had very good luck with Paphiopedilum, Phragmipedium and Phalaenopsis. There's no reason you can't use these on any orchids. You simply adjust the potting media based on how quickly you want them to dry out (example, medium or coarse bark).
These also are great for those who want to organize them in trays. They are designed to fit into the pot holding trays we offer in both 3 and 4 inch size. Therefore, these are sold as 12 and 15 pack pots.