Pilot’s Frixion series of groundbreaking erasable-ink pens became international bestsellers following their launch in 2006. Frixion products have now sold a total of 1.5 billion units worldwide.

It’s unclear whether the colors are mixed on the fly as the colors are chosen and you write. A lot of things are unclear at this stage! Cronzy has two months left to reach its goal of $200,000 ...