Yes slim, it's supposed to be a vase (ikebana style, for one flower or leafy thing). I'm doing a water test to see if it holds water. Or it could be a really cool single pen holder. or reed diffuser. Or doorstop
As for capturing the colours better - what kind of camera do you have? Can you adjust the white balance manually? If you can't, I find that shooting in all natural light will give the best results colour-wise. Also, placing the object on a white surface will reflect more light back onto it.