GL-Sail(TM) 36 Pack Diamante Tipped Gel Pens http://www.amazon.com/dp/B0176D1Q2O Got this set of gel pens and am very fond of it. The case is very practical, sturdy and locks perfectly. When opened, the pens stay hold to the case so there isn’t a mess of falling colors. They are great for adult coloring books. The diamond shape tip is very helpful when trying designs with intricate lines; The flow of ink is constant, and haven’t had an issue with smudges by heavy flow or that a pen doesn’t work. Love the pastel colors and the glittery ones give a very nice finish. There are a lot of colors to choose from without repeating any. Great product and definitely recommend it. Note: I received this product free or highly discounted for review and an honest and un-biased opinion.