Instruction: Given a question and the related document, and generate the answer to the question based on the information provided in the document.

Input:
Question: any one try this on a glass bowl?
Document: We had a hard time finding an egg separator and finally went to Amazon to get one. We love OXO brand items and this is no exception. The grip-y handle part helps it to stick on the side of a bowl or glass so that you have two hands to crack an egg. Dropping the egg in separates it pretty quickly and easily. I would buy it again, or if we lose our current one.
Otherwise, I have had success using it on a frying pan, mixing bowl, drinking glass (my Mom always taught me to break eggs into a glass in case I needed to throw one out without contaminating the entire mix or batch), Pyrex bowl with thin edge, Pyrex bowl with thick edge and a measuring cup.One thing I absolutely LOVE about this one is the lack of mess!
It sounded like a great idea and yes it sort of works...You have to hold the gadget while trying to crack the egg over it (compared to others which fit well over glass/bowl). I find it just as easy to use a spoon.
Oxo's 3-in-1 egg separator is a handly little gadget for the person who has the need and the space in their kitchen.The separator is built to grasp onto the side of most bowls. I tried it on a variety of bowls (glass, metal, plastic) of varying sizes. The separator worked well on all but a white plastic bowl that had a wider edge.
My mother raised me to know how to separate eggs. There were some dishes we cooked together back when I was a teenager that required a lot of separated eggs. Imagine my shock when Mom told me she now uses an egg separator. So, I decided to try one for myself. This is the only one I've used, so I can't compare it to other egg separators.The surface on which you can crack the eggs works well.
The first thing i did was try it out on different sized bowls. Not only did it fit, it was sturdy. What i found though that it would work with one egg...then not another one. They were all same size eggs but about half the time, the yolk would slip right through. I think the slits in it are just a little too wide or large. THe quality of the item wasn't cheaply made, like something I could have purchased at the dollar store.
The egg separator fits on the side of a glass bowl nicely. It feels pretty sturdy once in place.I used the raised ridge to crack the egg as suggested, and that consistently worked well too.I let the egg set in it for a little while (maybe 2 minutes) while I let the white separate. I used a fresh egg, so the yolk was rather firm and upright in the separator.
It does not claim to, nor did I deduct any points from the rating for this, but I simply add this as a helpful tip for those of you who might try it out as I did, to save you the heartache.
I admit that I'm terrible at separating eggs, so I jumped at the chance to try this little tool. It works great! I tested it on several bowls and it fit easily on all of them.
I liked the idea that it hung on the edge of a glass, but the glass has to be within a certain diameter or the thing either falls off or won't attach. Then you have the 3-handed dilemma of how to hold the thing and crack the egg into it. There's an interesting video on YouTube of how to separate eggs using a water bottle. Still hunting for a good egg separator, tho. mb
Answer: I used this on a glass bowl and a ceramic bowl.  It is a perfectly designed device.  Simple and easy to use.  I will use it everytime I want to crack a fresh egg.