I haven't used any in months and months. DS just doesn't feed enough from me for me to worry about it (bloody good job to! He's 18 months almost!)
So, I have a handful of them. Charity shops round here won't take anything to do with feeding/baby stuff apart from clothes.
So all I can do is bin them or offer them away!
Anyone interested?
(I'm not a weirdo. I have 2 DC, 3.5&1.5 and I've been a round mumsnet for a loooonnnngggg time. Happy to post to work address if that's makes you more comfortable)