Innocent Juices are buy one get one free at Waitrose - an offer is often available but with a my Waitrose card you get an extra 10% off selected varieties. I bought 2 of the Orange and lime and the till took 24p off each one plus £2.39 for the offer so total for 2 bottles was £1.91.
All of the varieties are buy one get one free but the extra offer is available on the following lines:
Orange and Lime
Apple and Elderflower
Orange and Raspberry
Apple, Peach and Pear