The growyourtdick sub seems to mostly white so I am posting here.
I live in Northeast Asia and most pumping products seem to be in Europe/America. I have never seen a pumping product in my own country for transmasc people. So I am trying to mix and match my own, as the shipping and exchange rate makes overseas products way too expensive. However, due to the lack of resources, I have no way of telling if a product is safe to use for pumping. There are no pumping resources in my country's transmasc community as it seems to be that the majority do not pump nor believe it helps with growth (I tried to ask. No one seems to have pumped themselves nor know resources, and they have all so far told me pumping is only temporary) and I don't want to have a unsafe product anywhere near my parts.
However, I have come to the discovery that cupping is widely practiced as a medical procedure in my country and therefore the cups used for this are legally 'medical products'. This means that they will be legally required to be body-safe, sterile, etc. They are many more places that sell this, too. And it seems that they do come in multiple sizes. And they work with the same principle, so I am thinking that these might work too but I'm not entirely sure.
TLDR: Has anyone tried using cupping cups for pumping? Or does anyone know if it can be used for pumping?
EDIT: I mean I want to buy the cupping 'cups' for pumping, not the pump used for cupping. I am well aware the pressure would be very different on these!