several glass tops / bowls

It seems like most of the water pieces I buy come with several glass "tops / bowls". I now have dozens of them. I just don't throw things out but it is time to get rid of these useless things. Is there anything I can do with them other than put them in the recycling trash?

It depends on what they are made of. Boro glass can't be recycled with regular glass for example.

thanks man
Its not a boro glass

I'd just sell them if you don't want them.
It's better than just tossing 'em.

I believe r/entexchange still has a pretty active discord channel.
That'd be a good place to unload them.

I have a whole stand full of them in my glass cabinet.
I don't sell them though, because I like to grow my glass collection.

I've used them to make some pretty bangin WPA for some devices, using orings. I keep all of them, and sometimes use them to insert or hold or otherwise interact with my different vapes. I've even used some as mouthpieces when legoing GonG parts. But I'm also someone who needs a wide variety of things to tinker with and test with, who also can't bear to part with things I can't create myself.