If it came bundled with a container of a specific substance, it can measure both volume and mass
It will still only measure volume.
Since you know the density the substance it can easily be converted to mass. But the mass is never measured.
At that point, it’s a distinction without a (meaningful) difference, although you are technically correct.
Powder, and especially protein powder, can vary significantly in density depending on how compressed and/or hydrated it is.
I agree that measuring by volume is much more convenient than weighing out your powder. Protein/supplement powders don't require very accurate measurements. If your shake has an extra half gram of protein powder in it, it's really not going to be a big deal.
This is called a natural FDA grade polypropylene (P/P) plastic scoop with a short handle.
I hope that helps.
