I'm searching the ruins but can't find anything. Have tried several times by now. Should I use the magnifying glass or something else? And is there a way to get in to the middle of one of the ruins?, the one on Green if I remember correctly.
You need to be using a shovel. (:
Also, if you can't access one part of the ruins, don't worry, the bottle isn't going to be there - just check everywhere you can get to. Make sure you've checked all three ruins; Green, Lost Jungle, and Ancient.