Instruction: Generate an answer to the question by utilizing the information contained in the document.

Input:
Question: What is the plastic adapter with the point on it? I cannot figure out what it is for.
Document: This is not everybody's territory. It's not hard, but also not exactly easy due to the limited access you have to deal with.Maybe the folks at Solofill will figure out an improved design that can mitigate this problem entirely - and if it did - it should think about using a different plastic for the black K-Cup adapter piece.The small black adapter that has the needle at the bottom and a thin slotted piece of plastic to cover the cups channel when inserted has melted* ( shrunk ) over time.
Put it back into the Solofill where the plastic point is located and you're ready for that cup of coffee! I'm into saving money!
This is a bad design because it is bound to get dull, just like the point of a knife. I just didn't think it would happen in a month. They should have made it like a hollow sewing needle that would puncture with a sharp needle point as in the original Kuerig machines.I have only used it with the plastic K-cups and have not cleaned it in any manner that would dull the point, so this dulling is just through daily use.
This advertises that you can use the k-cups with this special adapter but you cannot. I bought this just for that reason as there is more selection in k-cups. When you put a k-cup in the adapter the cover then does not close and does not fit in machine!
But the whole point of the k-cups is ease of use.Regardless, nothing will beat a french press.In summary, product works only if you do not use k-cups with supplied adapter, or else it will ruin your vue machine.
For the first few runs, all was OK. Kcup punctured cleanly, no grounds. Then, for whatever reason, slash instead of a puncture,  grounds everywhere. I paid, $73.xx for a 2 cent plastic adapter part, and now return/refund time. Word to the wise, don't........
I bought a Keurig Vue. The vue cups are not as readily available as the K cups so, needless to say,  I was THRILLED when I saw this K cup adapter.What a disappointment that it doesn't work. The K cups don't fit in it properly. The plastic lid doesn't' close.
I finally shaved some of the plastic material from this area, which seems to have helped a little. The second, much more minor gripe, is with the K-cup adapter. This little insert snaps into the main unit and definitely requires a pointed object to pry the tab out if you want to use the loose grounds filter. But as I said, that is a very minor gripe.
It works well. The only drawback I have found is when you use a K-cup the bottom has to be pierced. The V-2 adapter does this well at first but, after you use it awhile it has a hard time piercing the bottom. It tends to just bend it as the plastic piece that is supposed to do the piercing gets dull and won't do it unless you put a lot of pressure on it. Perhaps metal for the next gen?
This ensure a proper seat and that the needle will direct most of the coffee out of the adapter. With a little play and some work, you can make anything work in your Vue with the V2.UPDATE!-- This product has since been pulled off of the market. Both of our units began melting and sending little flecks of plastic into our beverages. Luckily I noticed the warping of the insert and was able to discontinue use before it made someone sick.
Answer: Since this version of the Solofill is used for the Keurig Vue system, regular K-cups will not fit. The adapter is used to facilitate the use of K-cups in the Vue system. I find that if you seat the k-cup on the adapter first before placing it in the container, it works as indicated. A lot of people do not do this and the point does not pierce the bottom of the k-cup allowing it to drain the coffee through it as it is supposed to. Then the coffee backs up through the top creating a big mess. I myself roast my own coffee and utilize the filter enclosed with it and it works great. Vue cups are hard to find locally and if you do find them, they are usually not what you really want.