A small poe caught inside a bottle. You can then drink it, which will either restore a heart or take one away.
It is item number #41 ☡ on Kokaro and belongs to an item set with 82 other items in its full set. It has a rarity factor of 3.
115 of these items currently are owned and exist in Kokaro by a total of 51 players.
Poe is from the game, The Legend of Zelda: Ocarina of Time.