Every now and then the milk company will come out with promotion (Tin-Exchange Program). Just last month, Friso have this Tin-Exchange Program whereas you bring a non-Friso formula milk tin when you purchase a 1.8kg tin of Friso 2/3/4, and receive Friso goodies of similar stage. Note: this program does not include 0-6 months old formula.
U mean empty milk tins? Well, sometimes there is promotion to get an empty tin to redeem for a brand new tin but of different brand. Some companies like Friso, Abbott does this type of promo at least twice a year. This is super cost saving as milk formulas are so costly nowadays.
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