A pair of measuring cups on a stick. Coose yor volumes. Originally made for measuring cornstarch for oogoo rubber. But equally good for coffee powder or anything else.Eiter use the common decimal fractions (in cubic mm): An example sequence: (100,500);-(200,1k)-;-(500,2k)-;-(1k,5k)-;(2k,10k);(5k,20k) Or use powers of three. With those you need the least number of measuring cups but calculating exact volumes gets cumbersome. Good for ratios though. A suggested base size sequence in cubic mm: (10,30);(90,270); -(810,2430)- ;(7290,21870) Or maybe better: (30,90); (270,810) ; -(2430,7290)- Better make the stick a little too long than a little too short.