Shop for Strive Oat Milk Plus Protein and animal-free whey protein, Strive for Better offers best tasting oat milk, almond milk plus protein shakes and water. Animal-Free, Vegan-Friendly Protein Strive FREEMILK, Strive Oat and Strive Almondmilk are enriched with Perfect Day animal-free whey protein — the world’s first milk protein that’s bioidentical to the protein found in cow’s milk but produced sustainably without cows and without the downsides of lactose, hormones, antibiotics or factory farms.