It may sound strange, but I like what I like, and I like this type of container for culturing fruit flies.
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It's the type of container that most online and offline shops use here.
It's the usual perforated square tub with a round tub that has a 1" or thereabouts hole in the lid which fits inside the square tub, I'm sure you all have seen them.

I like this type of setup for culturing my fruit flies as it suits my harvesting method perfectly.
I recycle them on the occasions when I buy new cultures due to a crash or such like or when they wear out due to being used several times.

The thing is, I would like to buy a load of them because I rarely get crashes any more and the only time I throw them out is when they wear out. But I cannot find anywhere I can buy them at all. I can find the perforated square tubs in small quantities, but not the round tubs to fit inside them and definately not with the hole nicely pre-cut.
Now seeing as so many places use exactly the same set. there must be somewhere I can buy them in say 50 or 100 sets at a time, but I cannot find it.

So do you know where I can get these ?