This Diamine InkVent Calendar is the perfect gift for the fountain pen ink enthusiast in your life (or, let's be honest, it's the perfect gift for yourself!). It contains a surprise ink color for 25 days, all of which are never-before-seen new colors from Diamine. The first twenty-four days contain a different 7ml glass ink bottle, and the final day contains a 30ml plastic ink bottle. The inks range in color and property, from standard inks to sheening and shimmering. We won't spoil the surprise of what the colors are, but we can say this is one ink set you won't want to miss.