There is nearly 50% sugar in each of the shakes (powder) though.
If you have 2 shakes a day that is 500ml of milk. You can have 350ml as HexA so the remaining 150ml would be 3 syns, then the powder works out at 5.5 syns per "meal".
Sooooo 2xshakes a day would be 14 syns and a HexA.
(I had to sit and work it all out for my sister!!!)