We have buckets of measuring cups. It's a particular frustration. They lose their painted markings fairly quickly and it can be hard to tell the 1/4c of one set from the 1/3c of another set, or the 2/3c from the 1c or the 1c from the 1-1/2c. Why is there even a 1-1/2c? Uugh! Melt a 1/4c cup? Guess it's time to buy a fifth set of all the cups all over again so we can have at least one 1/4c. Don't toss any of the old ones just in case the 1/3c goes through the disposal.
We have two kitchen scales. I never get them confused. They're interchangeable.