Can Starbuck's frappuccino still be tasty or at least good after 4-5 hours?

To make Mocha Frappuccino: Add coffee, milk, sweetened condensed milk, vanilla, and chocolate syrup to a blender. Top off blender with ice and blend until smooth and icy. (Add half-and-half if you'd like it to be a little richer and creamier.) Serve in a glass with whipped cream on top.Sep 29, 2014
Homemade Frappuccino! | The Pioneer Woman
thepioneerwoman.com/cooking/homemade-frappuccino/

If you put your coffee in a sealed container, such as a thermos, it will keep forever and can be reheated any time. But not if it has milk in it. So you pack all milk products in a separate container and keep it cold until serving time. Of course it might be inconvenient to carry ice and a blender, and I don't know about the Starbucks part. Don't they sell packets at the grocery store for that purpose? That is what we call a first world problem.