wanted to see if these were more solid than those now being sold at my usual UK chinese food / utensil cash-and-carry. sadly, they are just the same flimsy design.
while my old school 20cm bamboo steamers are 6mm thick on the rim, these ones are only 1mm thick on the rim. inevitably this makes them not as long-lived.
it also means you can't balance them as safely on the rim of a deep 20cm pan. for safety, these ones you will need to stand in the water inside the pan. with only 25mm clearance between the bottom rim of the steamer and the slats, the maximum water height to provide the steam is 25mm, probably less on rolling boil, if you want to use the lower ring to steam rather than just as a support for the higher ring. that's not much if you're used to using the water to boil something else at the same time.
in summary, its ok for what it is - but what it is, is a pale shadow of the more solid and versatile product it would have been a few years back. if anyone knows where they still sell 20cm bamboo steamers with 6mm thick rims, let me know !