The Original Square Jar

The FourSide jar effectively harnesses the power of your Blendtec blender.

  • Blunt safety blade is thicker and stronger than other blades/li>
  • Made from impact-resistant, BPA-free copolyester
  • Compatible with all Blendtec consumer blenders

The FourSide is ideal for:

  • Ice cream
  • Grinding grains
  • Soups
  • Smoothies
  • Dips and Batters

The FourSide jar’s square shape blends much better than traditional round jars. The jar also generates more friction, heating soups and hot drinks quickly and easily. It’s also especially good for grinding grains and making smaller quantities.

  • Capacity: 75 oz, with measurements up to 32 oz
  • Jar Dimensions: 5.37" wide x 9" tall x 5.37" deep; 3.88" wide/deep just above the base
  • Shipping Dimensions: 7" wide x 9.5" tall x 7" deep
  • Weight: 1.5 lbs
  • 3 year warranty
FourSide Jar is rated 4.1667 out of 5 by 36.
Rated 3 out of 5 by from Grinding sugar into powder I love the blend! Just wish you had a feature that I could use to help me grind my sugar into powder. It does a fantastic job except now the container leaks causing the plastic on the bottom around the impeller melted. Due to the friction in the grinding process because the sugar is so hot when grinding. Is there a container that can help me grind my sugar? It's one of the key ingredients in my chocolate business. Please help me. I only had the blender for few years maybe 2 years and just start my business a year and I already need a new container.
Date published: 2014-08-19
Rated 3 out of 5 by from good jar This is a good jar (the 4-side jar), I bought it to replace an older one that had many miniscule scratches in it and now stains easily. I will still keep the old as a back up, but it's nice to have a new, clean-looking jar again. The jar performs great, and I like the new lid (with easy access port), but I would REALLY like the option of buying either a stainless steel jar or a glass jar from Blendtec. If you guys at Blendtec ever get a glass or stainless steel option, I'll definitely buy one!
Date published: 2014-10-07
Rated 5 out of 5 by from Love the Four Side Jar! I bought my Blendtec with the Wildside Jar on sale at Costco last year and, while I have loved the operation of the blender, sturdiness and ease of cleaning, the bigger jar wasn't designated for some of the recipes and smaller amounts I wanted to use. Since getting the Four Side jar, I find I use it all the time with all the recipes I want!
Date published: 2014-07-30
Rated 4 out of 5 by from Liked old lid better I had to get a replacement blender jar as the old one started to leak after 600 uses. When i got the new jar, i noticed the lid is not completely closed and it comes apart in two pieces. This is harder to clean this way. The jar handle also is not solid its hollow so stuff can get stuck on inside of it. Im noticing the blades just are not fully blending frozen bananas in smoothies n i have to pulse it a few times after the cycle is done.
Date published: 2014-09-05
Rated 3 out of 5 by from Works great, but not for long 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.
Date published: 2015-05-04
Rated 2 out of 5 by from I got a replacement because my jar was leaking The new one maker so much noise that I am sure there is something wrong with it I would appreciate if you send me another one Besides I don't think I should have been charged for the replacement since that problem is a flaw in the design I like the blender but it is becoming a problem
Date published: 2014-06-28
Rated 1 out of 5 by from Bearings don't last, making jar worthless! I'm on my 5th jar, and the bearing go out quickly. The last jar lasted less than 500 cycles, so that's $.12 in jar cost every time you hit the start button. The blender is fantastic when the jars work, but they don't work for very long, and are expensive to replace. It shouldn't be that hard to find a quality bearing that will work in the jars for more than 500 cycles.
Date published: 2015-07-21
Rated 4 out of 5 by from Excellent Blender, Poor Bottom Gasket I love this blender, but am put off by the poor life of the container given that after about 300 cycles the blade does not spin freely. I clean and maintain it regularly, so I feel cheated. I clean it even better than the manual suggests so this shouldn't be happening. I am the only user, so there is no way somebody could be tampering with it or abusing it without my knowledge. It would be great if this blender had a kit to change the gasket at the bottom. THIS WOULD SET THIS PROBLEM TO REST AND LOCK IT IN AS A '10'. I don't think the competition does this. Nudge! Nudge!
Date published: 2015-10-30
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I bought my BLENDTEC at COSTCO.  The gasket in the jar leaks-can I buy another jar...PART # 40-505? 

Asked by: TBEAR72
Please give our customer service team a call at 1-800-748-5400. They'll be able to tell you if your jar is still under warranty. If it is, they'll send you a new one!
Answered by: BlendtecJess
Date published: 2015-11-23

I have a blentech 4 sided jar that came with ES3 total blend coffie. The seal on the bottom of the jar is leaking. can i get it repaired or do i have to buy a new jar? and if i do can i only order it online or are there store near me that carry the jar?

Asked by: battlerager
Please give our customer service team a call at 1-800-748-5400 so they can check if your jar is still under warranty or not.
Answered by: BlendtecJess
Date published: 2015-11-19

Is this dishwasher safe?

Asked by: Kk33
The jar is dishwasher safe - top rack only. You can learn more about how to properly care for your jar here:
Answered by: BlendtecJess
Date published: 2015-11-05

I just bought a blendtec with the wildside and twister jars.  I'm am primarily using it to make single serve smoothies, etc.  I have not yet used the wildside jar because of its size.  Do I need the fourside jar or should I just use the twister jar?

Asked by: Adventuresla
The Twister jar should work just fine to make single serve smoothies; just be sure to use the Gripper lid.
Answered by: Blendtec
Date published: 2015-10-26

What is the capacity for the of the jar with the classic 570 model

Asked by: Tillie
The WildSide+ jar comes with the Classic 570. The WildSide+ jar has a 90 oz capacity with measurements up to 36 oz* *We recommend that the finished blended product stays at or below this line.
Answered by: Blendtec
Date published: 2015-10-01

how long is the warranty on this jar

Asked by: Sunni
If purchased a la carte, it has a 3-year warranty.
Answered by: Blendtec
Date published: 2015-09-11

The wildside jar is more expensive. Is that just because it's bigger? Is it any better than the 4 side?

Asked by: dmlj
The Wildside+ jar is an upgrade in every way. It does hold more but also has a stronger vortex to bring the food back down to the blade faster and more efficiently, with the end result being a more consistent blend. This happens due to the blade being longer, along with the patented extra fifth "Wild" side and two vertical ridges on the interior walls. Smoothies inevitably can be made using a little less liquid because of this upgraded design.
Answered by: AdamBlendtec
Date published: 2015-11-05

Is this (the four sided jar) BPA free? We have a 7 year old Blendtec, is the jar it came with BPA free? Love the blender, one of our best investments!

Asked by: Lendash
You would have purchased your blender during the transition from non-BPA free to BPA-free. We could tell you for sure if we had a picture of the jar. Our current jars are all BPA-free.
Answered by: Blendtec
Date published: 2015-08-31
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