I practically gag thinking about insure and some of those other beverages. Carnation instant breakfast tastes like melted ice cream to me. Right now DS is on a vanilla kick and fortunately Sam's club has started carrying it and it's a LOT cheaper -- $6.50 for 22 packages compared to almost $5 for 10 at the grocery store.
I started off mixing up about 3 cups of whole milk, 1-2 ounces of cream and a package of carnation instant breakfast. Not as sweet tasting. Othertimes, I just mix up a package of it with 1 cup of milk and an ounce of cream. I keep a quart container in the fridge for convenience.
If DS just wants plain milk, I just grab the whole milk, add a big splash of cream to the glass, too.