This will ensure that you get a free pouch for each order of 2 pouches. So ordering 4 will give 2 free pouches. Ordering 6 will give you 3 free and 8, 4 free etc. There is no limit on how many can be ordered but if orders are made in odd numbers the odd number does not count towards the free pouch.Always for each two, a third will be given free no matter the size of the order.
