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 4.1515 out of 5 by 33.
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 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 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 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 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 4 out of 5 by from "We hope you'll write about your FourSide Jar while it's still fresh on your mind." Actually its fresh on our minds daily, since that's how we use it. Would prefer it be made of glass...
Date published: 2014-07-18
Rated 5 out of 5 by from Perfect smoothie maker! We received our much anticipated Four Side jar a few days ago, and have used it nearly every day to make smoothies. It works nearly flawlessly, and I say nearly only because if you add too much frozen and solid ingredients, it will fail to blend without tamping down the mixture. This has only happened twice, however, and with a quick tamp, a perfectly blended concoction emerged!! Love this blender, an this Four Side jar!!
Date published: 2014-07-06
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
  • 2015-08-30T07:04CST
  • bvseo_cps, prod_bvrr, vn_cps_3.1.6
  • cp_1, bvpage1
  • co_hasreviews, tv_3, tr_30
  • loc_en_US, sid_40-609-50, PRD, sort_relevancy
  • clientName_blendtec

We use our BlendTech to juice complete veggies and use turmeric everyday. the blender is stained and is starting to smell like "older veggies".How do we clean it safely?

Asked by: Nancy Maloney
Here are some suggestions: 1. Fill the jar with hot water. 2. Add 1-2 teaspoons of liquid chlorine bleach. 3. Stir for 10 seconds to mix water and bleach. Let mixture stand in jar for 5 minutes. 4. Empty water/bleach mixture. Turn jar upside down on dish rack until dry. Others have found success with: - Add the juice of 1 lemon, 2-3 tbsp of baking soda, and some water to jar. Run on a high speed for about 10 seconds, pour the water out and scrub with a non-scratch sponge. - Vinegar mixed with baking soda and some water will also work. Run on a high speed for about 10 seconds, pour the water out and scrub with a non-scratch sponge. - Add 1-2 tbsp powdered dishwasher detergent dissolved in 1-2 cups hot water, let soak for 1 hour. Then, scrub with a non-scratch sponge. - Combine Lemi Shine® Original with some powdered dishwasher detergent and let soak in the jar for 20 minutes.
Answered by: Blendtec
Date published: 2015-08-27

Whats the difference between jar model 40-615-50 and 40-630-50?

Asked by: blendy
Model 40-615-50 is our discontinued WildSide jar, and 40-630-50 is our new WildSide+ jar. The WildSide+ jar features two vertical ridges on the interior walls to disrupt the blending pattern even further and accelerate the blend.
Answered by: Blendtec
Date published: 2015-07-24

Hi, I looked at the dimensions of each jar as listed on your site (under  "Specs") for each jar. The Fourside and the Wildside+ are both listed as 7" wide x 9.5" tall x 7" deep. Is this an error? I thought the Fourside was smaller.

Asked by: MissJelic
Those dimensions are the dimensions for the box that the jars come shipped in. However, the dimensions of the width and depth of the top of the jars as well as the height are all the same. It's the contour of the jars that is different and makes the WildSide+ jar larger. If you look at images of the jars, you can see the different shape. Hope this helps!
Answered by: BlendtecJess
Date published: 2015-07-07

Does blendtec have plans to r&d the leaking seal issue and fix it? This is not a logical product to purchase if there is no plan to fix this issue.

Asked by: Mickeydee
We are working hard to resolve this issue. In the meantime, our warranty covers our jars for any issues you may encounter.
Answered by: Blendtec
Date published: 2015-08-04

May I just buy a blade??

Asked by: Yoony
Because the blade is sonically welded to each jar, you cannot replace just the blade. If you are having issues with your jar, be sure to call our customer service and find out if your jar is still under warranty, 800-253-6383.
Answered by: Blendtec
Date published: 2015-06-09

I have the Wildside jar.  I read the FourSide jar is better for ice cream.  Does it really make enough difference to have two jars?

Asked by: LuLuferd
No, it doesn't make enough of a difference. You'll be able to make ice cream in the WildSide+ jar. In fact, our most recent ice cream recipes worked better in the WildSide+ jar!
Answered by: BlendtecJess
Date published: 2015-06-08

we've had our blender 5 yrs and use it daily. We had to replace the jar because the blade became very difficult to turn and it was wearing out the engine. Our latest jar is now suffering from the same problem after 1.5 yrs. any solution? WD-40 didn't work

Asked by: Merry
Here are some tips that should help maximize the life of your jar: -Spin the blade manually by the shaft on the bottom of the jar before each use to lubricate the blade shaft. -Don't use your jar as a storage container or let liquids sit in the jar overnight. -Wash your jar or use the Clean cycle immediately after use. If you continue to experience issues, please contact our customer service team at 800-253-6383.
Answered by: Blendtec
Date published: 2015-05-18

Can i buy any jar for my blendtec?  Does  it matter?  My blade has gotten dull.  Could u please advise?  I've  had my blendec for over 7 years.  Thank you 

Asked by: lilie
The WildSide+, FourSide, Twister, and Mini Twister jars will all fit on your blender. However, I recommend calling customer service first (800-253-6383) to check and see if you are still under warranty. If you bought the blender new, it has an 8-year warranty.
Answered by: Blendtec
Date published: 2015-08-04
  • 2015-08-30T07:26CST
  • bvseo_cps, prod_bvqa, vn_cps_3.1.6
  • cp_1, bvpage1
  • co_hasquestionsanswers, tq_69
  • loc_en_US, sid_40-609-50, PRD, sort_recentAnswersFirst
  • clientName_blendtec