Im not sure if its like the old one i used to have, does it have a brown tip and inside that tip there is a cotton wool type filler? if so you can buy the eliquid and fill yourself. its so much cheaper and the bottles last ages.
you can get them form loads of places online. I upgraded to a different type of electric cigarette that looks nothing like one but is absolulty brilliant and last nearly two days before the battery needs charging, whereas the cig look a like lasted only one-two hours.
if you need any info on best/chaepest place to buy let me know. Im currently buying my liquid from:
this is the direct link to high tobbacco flavours £7.99 for a 30ml bottle will last ages. if you look at the left hand side under eliquid there are loads of different headings which are just different brands of eliquid and under each brand there are different flavours, strenghts, etc.
its all a bit confusing when you first start but there are lots of forums to help if needed. i go on ukvapours forum and theres a bit for new users to ask all sorts of questions.
Im not an expert but i can help if you need any advice at all just let me know.
I bought one upgraded and ending getting my mum, dad, auntie, uncle and two friends off the fags and onto electric fags its so easy and cheaper than smoking.