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 4.1568627450980395 out of 5 by 51.
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 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 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 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
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 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 Rubber on bottom of jar wears out too quickly I bought my K-TEC (company's old name) blender in 2003 since it was the strongest on the market. It works great still. I only use it about 2 times a week to make smoothies. The problem I keep having is that the rubber on the bottom of the jar keeps wearing out every 2 yrs or so. The warranty is for 3 yrs., but it never makes it that long. They did replace my prior one for free, but the new one wore out in 1&1/2 yrs and I have to now pay for a new one. So, the replacement didn't come with a warranty. Can't something be done about the rubber seals? Plus, you have to buy a whole new jar, not just the seal. Not cheap & a waste of plastic that's still all good. They did give me a small discount, but still cost a lot. I have done all the company has suggested in the way of taking care of the jar, such as turning the drive shaft, keeping it clean and I always hand-wash it. My rating is for the jar only.
Date published: 2015-04-28
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What is the part number of this cup?

Asked by: Nino L
The part number for the FourSide jar is 40-609-50.
Answered by: Blendtec
Date published: 2016-07-11

Can this be used with K-tec Champ HP3?

Asked by: Irene09
Yes, the FourSide jar can be used with the K-TEC Champ HP3.
Answered by: Blendtec
Date published: 2016-06-27

Is Blendtec smoother 13 blender compatible with the Blendtec Four Side jar?

Asked by: budgies
Yes, the FourSide jar is compatible with the Smoother 13; however, you will need to purchase one through a commercial dealer:
Answered by: Blendtec
Date published: 2016-06-20

will this fit model number ICB4ABC4?

Asked by: seanpjs
Yes, the Fourside jar will work on the ICB4 motor base.
Answered by: AdamBlendtec
Date published: 2016-05-10

Which Jar should I get for my Blendtec HP-621-FLP Total Blender, Black model?

Asked by: Mchg
It really comes down to preference and what you are looking to use the jar for. These are the options we have that will fit on all Blendtec blender models: WildSide+ jar: Great for larger blends and creating multiple servings of smoothies, etc. FourSide jar: A similar jar to our WildSide+, but it's a bit smaller. You can typically make 2 smoothies with this jar. Twister jar: Perfect for thicker blends, like hummus, nut butters, and more Mini Twister jar: Similar to the Twister jar, just smaller Mini WildSide jar: This is a smaller version of our WildSide+ jar, and is perfect for single-serve smoothies, as well as making smaller servings of dressings and sauces. You can learn more about all of these jars here:
Answered by: Blendtec
Date published: 2016-04-15

I am buying the Total Blender. is this four side jar compatible to my blender?

Asked by: djuan188
Yes, the FourSide jar is compatible with the Total Blender.
Answered by: Blendtec
Date published: 2016-04-15

I love my model CTB2 blender, but I am not happy with the jar. I make a smoothie every morning and clean the jar according to the manufacturer's instructions. The jar has become etched and looks cloudy and dirty. Is this covered under the warranty?

Asked by: Ruth56
Discoloration, stains, and markings can potentially occur on the inside of the jar depending on what is blended. This is considered cosmetic and is not covered under the warranty. There are a few cleaning solutions that have been known to work on certain kinds of stains and markings. If you call customer service at 1-800-253-6383, we can arrange sending the cleaning document.
Answered by: AdamBlendtec
Date published: 2016-03-07

Are the jars dishwasher safe?

Asked by: Jarhead
Yes, our jars are dishwasher safe. Putting it on the top shelf and turning on the dry heat cycle is best. However, we recommend that you don't put your jars in the dishwasher; they will last longer and work better if washed by hand or using the blender itself. For cleaning tips, check out our Use & Care page:
Answered by: Blendtec
Date published: 2016-02-22
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