I needed some more four litre-ish plant pots, but I had no reason to be going anywhere near a garden centre (nor in fact anywhere else) for a while so gave in and ordered some plastic ones online. I try to avoid buying plastic stuff where possible, but in this case they were just the most sensible option.
I was quite distressed when they arrive to find two of them broken:
Having to use more plastic is bad enough, but not even being able to use it when it arrives makes me quite unhappy. Perhaps I can trim them down and make use of them somehow, though my experience is that once the integrity of the rim is compromised the pot loses quite a bit of its strength.