The “wild side” jar is great and always there when I need it. It has a large capacity and helps blend things really well. The one down side I have come across is that it seems to stain over time. I make a lot of green smoothies, and despite washing it with dish soap after every use, the jar will inevitably turn brown over time. I am not sure if it is vegetable cellulose, but it doesn’t come off no matter how much I scrub. I end up usually buying a jar once a year because of this. It would be awesome if this could somehow could be prevented, or some sort of new material or finish could be used to make the jar. Other than this issue, I have no real complaints about the quality of the jar.