I bought the four side jar for my mixer because it was shipped with the larger wild side jar. I use it primarily for smoothies and didn't need that much volume. With my four side jar I now make my smoothies perfectly every time. I have now even begun to use both jars simultaneously for large prep. It's great. I use the big jar to break down and juice a watermelon and then the small jar is ready for the juice I made to make the base for a smoothie
I've been using these for over 10 years and blend about 4 times a week on average. The contents range from yogurt and fruit smoothies to heavier items like meat and vegetables. We only fill the jars to about 24 - 30 ounces and get absolutely perfect results every time with only a single blending cycle (50 seconds). However, they only last about 1-1/2 years before the seal fails and the blade doesn't turn easily. Always slightly past the 1 year warranty, of course! But as long as the blender keeps working I guess we'll keep buying the jars.
Response from blendtec.comBy kfarley, Digital Marketing, May 5, 2015
Great news! Our jars now have a 3-year warranty!
Here's some more tips to keep your jar running smoothly:
1. Spin the blade manually by the shaft on the bottom of the jar before each use to lubricate the blade shaft. 2. Don't use your jar as a storage container or let liquids sit in the jar overnight. 3. Wash your jar or use the Clean cycle immediately after each use.
We bought the four sided jar when we bought our blend Tec. It was fantastic, used EVERY day for smoothies and sauces. When the motor went blendtec replaced it with out any problems. Now we are back to using our blendtec daily!