In bansko they have new lift pass readers so you just keep them in your left hand pocket and they get automatically read as you go thro.There is a 5 lev deposit for them which you get back at the end by putting them in a machine at the bottom gondala station - this is to do with them being able to issue you with a new one if you lose it.But as it never comes out of your pocket it's unlikely to be lost - unlike hats,gloves,ski poles