UPDATE 4/24/17: COLORS ARE NO LONGER INCLUDED IN TRAITS!!
Common traits
Roundish bottlesNon living things (like seeds, sand or petals)1 plant, rock, crystal inside (non-living except for plants)Hooves are unshornEarth ponies
Uncommon Traits
Squarish bottlesAir inside bottles Tail can also be air (transparent and like a genie)Hooves are shorn at end (tiny bit)Unicorns
Rare traits
Diamond bottlesWater inside bottleTail is water (like a waterfall)Hooves are shorn 1/3 way upWater is shown through the shorned hooves1 sea animal inside (coral, starfish, fish)
Ultra-rare Traits
Heart or star shaped bottleInside bottle is any type of liquid