Update: Check out my review of the Vitamix Stainless Steel container (released in July 2020). In my opinion, it is better than the Waring one described below. Here’s a direct link to the new container.
Vitamix used to make their containers out of stainless steel, but in the early ’90s they switched over to transparent polycarbonate to allow you to see what you are blending. (The old stainless steel Vitamix containers are not compatible with the current Vitamix models.) Then in 2007 Vitamix switched over to BPA-free Tritan copolymer. Some people don’t like the way a plastic container gets scratched up over time, and others are concerned about preparing food in any sort of plastic container. Mother Jones has covered how BPA-free may not be helpful when it comes to avoiding estrogenic plastics.
I personally don’t think the risk is high, and I am continuing to use my Tritan containers, but I understand if you want to avoid them.
Waring makes a line of high speed blenders that uses the same 12-splined coupling that Vitamix does, and somewhat surprisingly, the Waring pitchers fit on current Vitamix models. Further, Waring makes a stainless steel container that fits the Vitamix drive shaft. [This page includes affiliate links, which means that if you make a purchase after clicking a link, Joy of Blending may receive a percentage of the sale. (Thank you!)]
Keep in mind, however, that neither Waring nor Vitamix have approved their products for use with the other company’s products, so if any damage occurs, the warranty may be voided. But this is the only stainless steel option for current Vitamix models. Another option is to buy the Waring model that comes with this container, although the Waring warranty is not as long as Vitamix’s, and they are not as home-customer friendly as Vitamix.
The other thing to note is that the rubber centering pad (the black rubber piece on the top of the base with four posts that the jar sits on) of the consumer Vitamix models is not a perfect fit for the Waring container. The posts are slightly too high. So instead of the container sitting on the pad, it sits on the tops of the posts, about 1/8″ off the pad. It is functional like this, but it seems slightly less stable, and it means that the drive shaft is not fully engaged. The gap looks like this:
I see a few options. You could just leave it, as is, and it would probably be fine. Or you could trim the posts by ~1/8″, although you would probably have to seal them because they are hollow, and I suspect that if you cut off the tops, then they would be open, which is non-ideal. I think you could seal them with some silicone glue.
The best option, in my opinion, is to get a different centering pad. It turns out that Vitamix makes a centering pad (15578) with shorter posts for some of their commercial models.
I checked, and the 15578 centering pad fits perfectly on the consumer Vitamix models. It allows you to use the Waring jar with no gap, and it also works with the Vitamix jars. The image at the top of this page shows the Waring Jar on a Vitamix 7500 using this 15578 centering pad, with no gap. (The centering pad is easy to swap on and off: it’s flexible, and it’s a pressure fit—you just pull it up, or push it on.)
This 15578 centering pad works on both C- and G-Series Vitamix models, which covers all of the home models sold since the early 1990s, with the exception of the smaller S-Series personal blenders. Here’s a link to the centering pad on Amazon. It also works on the commercial Vita-Prep and Advance machines. [Update: the 15578 centering pad does not fit on the Explorian Series, because Vitamix slightly changed the plastic posts that poke up into the pad. You can still use the CAC90 with the Explorian pad, but you will have the slight gap shown in the photo above. The CAC90 will not work with the Ascent Series, because it does not have a NFC chip.]
The stainless steel container is not cheap. Its price fluctuates on Amazon, so check for current prices.
Finally, keep in mind that the Vitamix tampers are not compatible with the Waring jar.
If you’re curious about what the different centering pads look like, clockwise from top left in the following images are the pads for the Vitamix Advance, Waring, Vitamix G-Series, and Vitamix C-Series:
Note the taller style posts on the C- and G-Series Vitamix pads. Also note the indentations on the bottoms of the Vitamix pads are identical (that’s where the four posts on the base secure the pad), but The Waring indentations are different. The Waring pad cannot be used on Vitamix bases.
And this is what the bottom of the Waring container looks like:
The stainless steel jar blends satisfactorily. You obviously can’t see how things are blending as easily. I haven’t done this, but if you really miss the tamper, you could make your own out of wood dowels. (Drill through a smaller cross bar at the appropriate height to prevent it from hitting the blades.)
There is no glass jar for any high-speed blender. Vitamix has said that this is because of safety concerns. They do not want a glass jar to shatter when someone accidentally drops a metal spoon into it when it’s running.