I recently bought the clip on badge holders from Amazon and I really like them. They're only like $15 for 50 holders that seal like zip-lock with clips, and they are easily moved from tub to tub as needed. And as for other enclosures, I just clip them to the exposed top track in the corner and they hang there pretty well.
Instead of using actual hard badges, I use the tub cards from the software HerperPro. It gives me an ID#, QR Code for the app, Name, and Picture (albeit a small one), all on the front, and I can print them on regular paper.
I'm still 50-50 on the software, I'm trying it out in demo mode before I make the decision on either that or Reptilescan.
But I will never go back to stickers or writing on tubs again.I never have to erase or rewrite anything. Just print the ID card on paper, insert into the badge holder, and clip wherever convenient. Super easy and it looks really nice too.
(unlike my chicken scratch handwriting) Lol.