I like this version because it's not a retrofit and easy to take with you (remember: these are theft targets): http://www.rubbee.co.uk/ http://www.rubbee.co.uk

I like this version because it's not a retrofit and easy to take with you (remember: these are theft targets): http://www.rubbee.co.uk/ http://www.rubbee.co.uk/ I can't comment on the efficient of the different techniques though.