The pots themselves (have some in 30cm) look good (if you can find plastic pots ok), they are stable, the coaster is also there and I find them very convenient. The pots are down tight, but have pre-cut holes, you can easily break out with scissors, a knife or with a strong pressure with the thumb. In the 30cm pots this series there are Amazon Reviews by people who thereby pots are torn etc, I can not imagine that these pots, it would have to be in my opinion very clumsy do (I've in 5 pots each 4 holes, ie a total of 20 holes drilled, zero problems).
Can we therefore wholeheartedly recommend.