I have 21 unopened odyssey chests and 3 unopened cutesy chests since I have all the contents and don't want to waste them on boosters. It'd be nice if the items remaining number was shown, similar to the shop, or if they just didn't give boosters altogether (like the Divine Chest). Currently, I need to look if there are any missing items in the Odyssey Chest in the shop, but that will be removed in a couple of weeks.