The bottle is described as real solid. At one times the bottles were available with a metal top with a rubber gasket just makes one feel more secure.
It seems that I have always bought my Delta ink when I am in Amalfi. For the past two years (2009, 2010) the bottles there came with a plastic cap.
The ink comes in Black, Blue, Brown, Green, Orange and Red.
The bottles are a bit smaller (30 ml) from what I consider the standard size of 50 ml.
Black - while some reviewers have said this is not a true dark black, from my use of the ink I like the tone and it is a good black with no grey undertone. The ink performed well in a variety of pens. My only concern is the size of the bottle. I seem to buy this ink in Italy, when I am travelling, and the bottle does well in my travel briefcase.
Brown - there is the tone of copper to this brown.
Green - dark green, no yellow tones.
Orange - well on paper it is more of an orange/yellow.
Red - this is a strong red with no orange or pink undertones.