During some color prototyping for our solid vases, we came upon one particular color that would not act quite right. No consistency. sort of bland — but there was something about it that seemed to be reacting to the heat in the furnace, so we started playing with the color to see if we could exploit this reaction.
After a few tries, we came up with this remarkable effect — a single color formula which, when folded through the body of the glass, reacts to heat creating an effect not unlike agate. Interestingly, it doesn't work on the smallest vase size we produce, so it's only available in medium and large. Or should we say, grande and venti?