Just to share experience.
I bought a two pack of the shakesphere v1 shakers from their website. I thought a good deal at £10 for two.
They work by being spherical at either end and not needing a grill or ball. This mixes the powder and means nothing gets stuck in the corners.
Unfortunately it doesn’t work with huel.
I tried 50g, 75g, 100g and 125g with a suitable amount of water for each. Even at 50g it was still lumpy.
Looking at their range even the new ones seem to be made using the same dimensions and shape so I’d predict them to be just as ineffective. And their new models are ludicrously expensive and can’t be dishwashered.
Back to the drawing board.