There is a voucher in today's (Thurs 23rd July) Metro newspaper on page 19 for a free 500ml bottle of Oasis, any flavour, from Sainsbury's. You can't miss it, it's a half page ad with that silly rubber duckzilla!
Simply cut out the voucher and present it at the till. It can be redeemed for any 500ml Oasis of value up to £1.05. No other purchase necessary.
Since the paper is also free I thought this was a great little offer!
Voucher valid from 23/07/09 to 30/07/09