HCA: Hermit Crab Association

So first off: I got this shower caddy and I'm planning to put live moss in it, but that hasn't arrived. My main question is about the net. Is that going to be ok for the hermit crabs to climb, or do I need to adjust it in any way?
picture 1: https://i.imgur.com/ZgUH5f4.jpg
Second: I found this cool glass jar swingy thing, I was wondering that if I could wash it, is it safe? I assume to wash it I just dunk it in warm water, because boiling glass isn't a good idea
The main thing I'm worried about here is that the thing that water pours out of, the hermit crabs will try to climb in and get stuck and die.
picture 2: https://i.imgur.com/Z8QTlS1.jpg

The net should be fine. If the crabs are having trouble climbing it you can just tauten it as needed.

As for the glass... pitcher? Jar? Swing? I can’t tell if the opening is large enough for a crab to crawl through, so that’ll have to be your call. I would also avoid it if the metal is painted or made of stainless steel.


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Got it, thanks. I was planning on laying the glass on its side with the cork top off and put some moss in there or something, I was just worried that if they tried to burrow then they would get stuck in the thing where the water comes out.