zindagi pen hai is ke rifill ho tum pen ki pai jati hain qismen bahut koi montex hai koi piolet hai pen mahnge hain jo un ki ek khasiyat man kare jab aap rifill badal sakte ho lekin main pen hun 3 rupae wala jis mein aisi koi khasiyat to nahin ek kami hai magar ye tut jaega par rifill badalta nahin