Personally I wouldn't bother with either of them. I'm not keen on the idea of glider baths. Gliders do a very good job of grooming themselves ... some too much! The gliders themselves don't have an odour .... it's their pee/poop that can smell. So I'm not sure what the benefits of glider shampoo would be.
As for the 1st item. Gliders do love branches, but that is because they like to strip the bark. So i'm not sure the wood is safe. It may well be, but I wouldn't pay $40 for something that they will tear up pretty quickly lol. I'd rather get free ones and just give them a scrub so that they're safe :) But that's just me lol. If someone can clarify that mahogany wood is safe, and you don't mind paying that price then by all means buy it. As I said, gliders do enjoy stripping bark (or at least mine do) and branches are a good place to hide acacia gum or other treats x