Those grids have always been poor for mixing any sort of protein powders I’ve used previously. Not only are they hard to clean, they don’t actually mix the shake that well. That being said, I love Huel’s shaker bottles because they are bigger than most and that means more space for water. I had previous blender bottles I purchased that came with wire whisk balls, much easier to clean and it mixes the shake better.
Considering the good Huel has done for my nutrition, a 6$ investment was a no brainer. Hope this helped!