The collective wisdom of the internet (and AI) says very different things about the possibility of gluing polypropylene. Does anyone here have personal experience and want to share?

Or maybe there's a way to cheat around the problem.

I'm going to build myself an extremely small "sink" for the workshop where I can make coffee and rinse glue brushes. The water comes from a container above, and the drain is a garden hose. I have a large PP funnel as the sink itself, and then I have a smaller funnel with the right diameter at the bottom for the hose. The two funnels need to be glued together and function as one. They do not have the same angle.

Find a good glue that bonds PP?
Go all out with half a roll of duct tape and put up with it being ugly and possibly dripping at the seam?
Use some spongy double-sided tape in the seam that both sticks and seals?
Or use the clever tip I will soon get here?
 
Good tips on products to try. The small funnel came in a three-pack, so I have material to test with. I'll try and get back to you and let you know if the funnels stuck or if only my fingers were receptive.

The idea of a thicker hose and adapter was my first choice, but the funnels that are large enough have pretty hefty openings, and I can't find any adapters for them.
 
Perhaps I should follow up so that someone looking for the same answer gets some help. "All plastic" apparently doesn't mean all types of plastic, so that gluing didn't work.

The solution was quite simple. A roll of double-sided tape of the kind meant for mounting bathroom mirrors. The one that's a bit spongy and fills in even if the surfaces aren't perfectly smooth. It holds like a rock and is tight.
 
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Johan Gunverth
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