I've been using Vitamix for about 20 years.  I recently got the 48 oz jar since I only had the 60 oz jar and the dry grains jar.  I love the 48 oz jar as it is such a practical size.  I really love making my fresh cashew milk with my Vitamix after soaking the nuts overnight and using 1 part nuts to 3 parts ice water and 1 tsp of vanilla, then blending for 1 minute.  I get a wonderful, rich tasting milk on demand that I can use instead of dairy and never worry about any of it going to waste.