The sheer number of OXO products available and the variety of price points they are built to makes it inevitable that some of them will be duds. Indeed, over time it has become clear that the presence of the brand on an item does not necessarily guarantee good design or build quality. That said, I have found their Good Grips steel measuring cups to be a great success in both regards. After more than a year of daily use, I still can't think of anything that would improve them.
Like most sets, a ring is included to keep them together when nested. Traditionally, the ring is troublesome because removing a cup also requires the removal of cups that come before it. This problem has been solved by opening the handles' holes on one side, allowing you to pull a cup off of the ring via the opening and then simply clip it back in place. Additionally, the rubber on the handle is set back a good bit from the cup, allowing for easy leveling with a knife.
The build quality is excellent. The cup and handle are fashioned from a single piece of surprisingly thick steel, eliminating the weakness of a weld point. Each cup's measurement value is permanently inlaid into the rubber handle, such that no amount of scrubbing will take it off.
A similar plastic set is also produced under the Good Grips moniker. It features the same open-holed handles and inlaid measurement values and is slightly cheaper than the steel set, but it takes up more room by including unnecessary ⅔ and ¾ cups.
Regardless of whether you opt for steel or plastic, these cups will probably be the last set you ever buy. – Cody Raspen