Hi there!
Indeeeeed, for that amount you would need the XL or Stainless Steel Shaker.
But for a 2 scoop meal, you should be fine with 300ml water and that should fit perfectly.
Feel free to check in with the customer care team when your next order is processing, we will gladly add a bigger shaker for you, no problem there.
You can reach out through the Live Chat option on the website or email us at love@jimmyjoy.com.
<3
“Really nice shaker, I wish I had more of these! I really love that part used for shaking the the liquid inside the shaker, so the meal doesn’t clumb up inside.”