If you like to do spot dyes or stripes or use liquid dyes and need to measure out the liquid then you will love having this set! I use liquid dyes and they save so much time and mess. They rinse out and are reusable over and over. They hardly stain from the dyes and with just rinsing them, I can move from blue to yellow, without cross contamination. This is a set and you will receive three jumbo and three small. These are the sizes I have found most useful.