extra pot?

I read on the Lunettte website that for sterilizing your cup you should use a pot that is used only for this purpose, not for food.
Why is that? To protect my food from menstrual residuals? Or to protect my Lunette from food residuals?
To me this seems a bit over the top and wasteful.
I would think if I clean the cup and pot each with the appropriate soap or dishwashing liquid before, and clean the pot afterwards again, together with the boiling this should be o.k.?
Do you have an extra pot for this?

yeah, I wondered about this too! tbh I find the idea of boiling my mooncup in the same pot that I use to boil food kinda unsanitary - although I've done it a couple times. But I agree that it seems wasteful to have a special pot only for your cup, and am looking into other solutions to clean my cup. Anybody?