Actually, now I think about it, that only covers one section of the market.

You should also release exactly the same product with with different packaging a few times:

• One with an off-brand Mr T character mascot, called “I Pity The Gruel”.

• One called “Bilk : Better than Milk”.

That’s a few shelves of supermarkets covered with selling the same thing. I’m sure you can cover some more with a few like “Barista Supreme: Oat-based Cream”, “Oat Water”, “Oat Juice” and simply “Oat-based Drink”. Maybe even “Oat Blood”, for Goths and “My dad was a gruelmaker” for Keir Starmer fans.