I'll be honest, that looks like very old salad.
Or a big piece of moldy broccoli
I'm assuming you live in the Netherlands?
those are the small pipes i was talking about. they're extremely harsh and in my opinion not worth the price even though it's cheap. i'd go with the thing i linked.
We have one that's somewhat long. I agree that they are a bit harsh (unless you take small hits), not near as bad as a bong though that's for damn sure.
im kind of confused, are you saying the bong is harsh? if so, then something's wrong with it. should be relatively smooth against your throat.