The lesson
Build the whole ad around one physical prop and one illusion, and let a logo printed on the prop carry the brand.
A phone stands upright on a reflective grey surface. Its screen shows an iced latte in a glass printed with "THE ORIGINAL OAT-LY!", coffee streaming in from the top. The illusion is that the pour belongs to the screen. There is no caption text, so the visual does all the work.
Don't copy the oat-drink context or the specific latte. Keep the single-prop setup, the mock-screen-inside-the-screen idea and a prop that carries the logo itself.