Firstly, I wouldn't put orchids of any sort into the bottles. There wouldn't be enough air movement. They do need ventilation in combination with humidity. For the larger terrariums, as long as there is adequate air movement, there are lots that would work....one that sticks out in my mind is pleurothallis grobyi. It certainly stays small. I can't speak about the animal addition. Hopefully someone can help you with that and give you more plant recommendations. You could always try to google terrarium forums.