Cello presents a unique new jar pack of its smoothest Ball Pen - Butterflow Simply. The Butterflow Simply Jar contains a 25 pc Butterflow Simply Ball pen (blue ink). Butterflow offers the smoothest writing experience with its lube flow ink system. The Elasto grip ensures comfortable writing. Butterflow Simply is suitable for home, school, or office use. A collectible jar is included with the pens for easy storage.