hi there hunny bunny I just happen to have a pack of two and on the back there is a web site it is
www.pentel.com
the address for warranty on these pens is
PENTAL OF AMERICA,Ltd
2805 COLUMBIA STREET
TORRANCE CALIF. 90509
I hope this helps and the name of the pens are Pentel R.S.V.P and you can get them in an assortmany of colors ink , blue ,black ,red, purple I know I have found in our local stores for about $1.00 a pack . have any questions please feel free to PM . Have a wonderful day love and hugs and very happy holidays to you. ~~~Lori~~~