Blue Angel Room Chests

[HuaGuiFei]

I apologise if this has been posted before. I am currently in an Angel room with two glowing blue chests that I can't seem to open, I don't have any keys at the moment so it might be that they just open with keys, but I thought I would ask in case I am missing something, how do you open them and what do they contain?

[Jookbaux]

They contain from what i have seen random chest items, and every time you open them they will re-seal themselves so they can be opened again to get more items. I have only seen them drop keys, coins, bombs Etc. so im not sure if they can contain items. But they are quite good if you have an overload of keys that you have nothing to do with. Hope this helped

[Ayven]

I found one of them in some other room, had a lot of keys. I was able to reopen the same chest ~10 times, then it gave me an item and didn't close after that. Kinda cool, like an eternal chest.

[Dagirkeran]

The way they work is: Open for a key, they have a chance to drop: Consumables, an item, or nothing.
If they drop consumables, they close a few seconds later, but if they drop nothing or an item, they're used up.

Really good for getting plenty of stuff if you're lucky.