This is one of my favorite ways to save money on "everday", nutritious food.
Usually Safeway runs this promotion once a month.
Save $1.50 on Lucerne 4L milk or Silk soy, almond or coconut milk.
Show the coupon on your phone, to the cashier or use the link to print.
Once you've purchased your milk, use the Zweet app on your smartphone and submit your receipt for another $.25 cents off any milk over 1 Litre. (valid until Oct 7, 2014)
See this post on how to use phone apps to get more cash in your pocket for items you buy.