Packages of 8x 60 gm Tubes are $2.50, and there's an Air Miles offer for 100 back wub 5. So, redeeming 95 cash miles makes the OOP $2.50 with 100 AM back.

A few other Yoplait. Sealtest, Natrel and Nature Valley products qualify as well and can apparently be mixed and matched as long as you buy five items in total (or multiples). Find the Dec. 3-10 flyer to see exactly what they are, but note that the prices shown are no longer current. Afaik, buying 5 Tubes results in the lowest OOP.