We've lost jibbitz in the past as we put them in Disney Crocs
My Mum was quite cross about this actually, she spent quite a lot of money buying the girls some Disney Crocs in EPCOT and the CM helped show the girls all the princess jibbitz that were available and being the generous Grandma she is she bought them the full set each, total bill over $120 dollars. Not once did the CM say that they weren't suitable. The girls were so disappointed when they started losing jibbitz. A few days later I asked a CM at world of Disney who confirmed they weren't suitable