Instruction: Extract information from the supporting document to answer the given question.

Input:
Question: Is this plastic or rubber product.
Document: This is a good product. It's much more effective, and less stressful on the wrist, to open jars using this opener than one of those thin rubber gripping pads. The multiple sized circles mean it works for various sizes of jars, and it has good grip. You can't see it in the photo, but the darker color on the outside is a hard plastic, and the lighter color along the inside is actually a slightly less dense plastic which allows it to form just a bit to the shape you're gripping.
There are some jars both my husband and I have trouble opening. This makes it easy. It is well made. The outer material is hard plastic and the inner material that contacts the jar is rubber so it doesn't slip and really grips the jar.
I haven't used this much,but it's worked well so far.The design is especially nice because you don't have to have huge hands to open large lids.With other designs the handles open too wide to get any kind of grip.This will grip lids up to 3".It's constructed of heavy duty plastic and grippy rubber so it won't rust.
This is my second EasiTwist jar opener. The first one lasted 4 years. It is  just plastic and some kind of rubber and while it was the plastic that broke the number of jars that I have opened without pain is well worth buying another one. I have several other jar openers that are not worth the space they take up.
Holding both and running a thumb along the inner surface that actually grips the lid/top, the Evriholder had more static friction. This may be because the Evriholder inner surface was made of a soft rubber, while the no-name brand inner surface seemed to be made of a hard rubber, bordering on being soft plastic. The result was that Evriholder seized and held the lid, while there was some slippage with the no-name brand.2.
This worked well about 2 times and then the inner rubber gripping material came loose from the plastic part and it has been messed up ever since. It still works sometimes, but it's such a hassle because the rubber part keeps moving and I have to adjust it several times, each time before I can get it to work. I usually end up throwing it back in the drawer and doing the old fashioned tapping of the edges of the lid with a knife handle to loosen it. It was a waste of money.
If you have arthritis in both hands, this product is not for you. If you only have arthritis in one hand and can hold the jar with the other hand, I am sure the product would work fine. I am going to test my mother's suggestion to wear rubber gloves.I gave this product three stars because it would work great for an individual who only has problems with one hand.
This product works, it's just that for me the plastic has already  started to come unglued...So I fear I may have to purchase another one shortly. I love it though. Has helped me open a lot of products. I just wish it was made to last longer. :/
This product is terrible. I bought three of these to give as gifts. The first one I gave to my daughter and as my husband was demonstrating how it worked it broke in the middle. Later we tried a second one and it did exactly the same thing. These are made of hard plastic which have absolutely no give. I wasted my money!!! I own one of another brand which is more flexible and I love it. Do not buy this one!
It simply does not work. The  rubber slides around and does not grip. I could not open anything with this. Going in the garbage.
Answer: Actually, it is both. The outside is a plastic type material, very sturdy, and the inner "circles" are rubber for grip. This is not a cheaply made product even though it is made of a plastic material. It is not the brittle kind of plastic that won't hold up.