Contigo 28oz Shake & Go Fit Plastic Water Bottle The large-capacity Contigo 28oz Shake & Go Fit Plastic Water Bottle ($7) is great for when I want to blend my protein powder with my powdered collagen and greens. While I've never bartended in my life, I hold it from the top and bottom and shake it like I'm making a massive, protein-packed, nonalcoholic cocktail. Image Source: target.com Contigo 28oz Shake & Go Fit Plastic Water Bottle $7 from target.com Buy Now