I really hate the tetra packs and was wondering whether anyone made up their packs in the morning before work and took them in a flask. I do not have any facilities to make the shakes up at work and i can't go through the whole work day without having one. I know the packs say i should drink within 15mins of making the shake but my cdc said i can take it in a flask or mix a mousse in the morning and take them to work