Unlike Ivo, I quite like these. I've had several through my hands, and always assumed them to be Dartington because of the smoke colour, that they called Midnight
. They work well as flower vases because of the corners, the colour helps stop algae forming, but you can still see when the water needs topping up, and they look ok when not in use.
There aren't that many glass flower vases so effective.
ps Did they come in a box with a full colour painting by Kim Thrower on it? See http://www.glassmessages.com/index.php/topic,7744.0.html