The BIC Cristal pen is the most successful product ever made, with over 100 billion units sold since it came out in 1950. Its design hasn't changed in over 70 years, and it still sells 14 million units every day. The pen works using capillary action, which pulls the ink onto the ball without needing gravity. Before the BIC Cristal, pens were expensive and hard to use, but this pen made writing easy and affordable, costing just $2 when it first hit the market. Its simple and effective design, with a hexagonal barrel and clear body, helped boost literacy rates and made writing tools available to everyone. Credit:br Shark Tank Global YouTubebr Animation is created by Bright Side.br br ----------------------------------------------------------------------------------------br Music from TheSoul Sound: br Check our Bright Side podcast on Spotify and leave a positive review! br Subscribe to Bright Side: ----------------------------------------------------------------------------------------br Our Social Media:br Facebook: Instagram: TikTok: br Stock materials (photos, footages and other):br ----------------------------------------------------------------------------------------br For more videos and articles visit:br ----------------------------------------------------------------------------------------br This video is made for entertainment purposes. We do not make any warranties about the completeness, safety and reliability. Any action you take upon the information in this video is strictly at your own risk, and we will not be liable for any damages or losses. It is the viewer's responsibility to use judgement, care and precaution if you plan to replicate.