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Graze.com
A colleague gave me a code for this, and I had some free snacks sent to me at work on Friday. I got some fresh pineapple, pistachios and razcherries (whatever the hell they are). They send you them through the post in a box. Anyway if you want the code it's: 73WX145. It gives one box free and then one for half price (£1.50). You have to give your card deets, but you can cancel at any time.
(I don't work for them or anything, I just thought you might like some free snacks)