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Herewith feedback from our supplier.
Hope this helps
Mpas is the same as centipoise.
Cups measure Centistokes. To convert from centistokes to centipoise, the density of the liquid is required.
Assuming the shampoo is a similar density to water (1) then centipoise and centistokes are equal. 1200 to 3000 is outside the range of all cups.
I suspect the shampoo is thicker than water so I would need to know the density to be sure, but don’t believe a No 4 cup would be suitable for this application. Maybe no cup will be in this range.
Which type of cup is it?