OTTO Grinder: The Definitive Guide and Review

OTTO Grinder Quick Summary


  • Produces an outstanding grind consistently.
  • Extremely easy to use and works fast.
  • Compatible with weed, tobacco, and other herbs.
  • Very fast and efficient.
  • The measuring cup means there is no danger of overfilling.


  • Far more expensive than a traditional grinder.
  • Transferring the herb to a vape pen isn’t as easy as moving it to a cone.

Are you relatively inexperienced but fancy smoking a joint? If so, grinding and rolling the weed is the trickiest and most frustrating part of the process. Even experienced tokers often dislike picking the bud apart. It is messy and typically results in sticky fingers. But it is essential because ground marijuana burns more consistently when packed in a bowl or smoked via a blunt.

Cannabis lovers who haven’t invested in a grinder have come up with some pretty innovative ways to get the job done.

They may cut it up like parsley with the help of a chopping board and put the herb in a coffee grinder. Some even use scissors with the weed in a shot glass! Alternatively, you can purchase a standard grinder. However, they usually come in several pieces which are a pain to transport. Also, the plant can get stuck in the device.

If you would prefer to dump the herb in a machine and let it do all the work, check out the OTTO Grinder from Banana Bros.

Who Are Banana Bros?

Banana Bros is a relatively new company. Manny Montano and Dave Richmond founded the brand in 2017. The company’s goal is to create products that “make it easy, to take it easy.” As a result, the firm has developed an innovative way to grind weed and create cones without the mess.


The OTTO Grinder is its masterpiece. The brand describes the product as a ‘game-changer.’ It says that its all-in-one cone making device elevates the experience. Banana Bros also sells a small collection of clothing and premium pre-rolled cones. However, there is no question that the Culver City-based brand’s main product is the OTTO.

What Is the OTTO Grinder?

It is marketed as the first all-in-one grinding and rolling device. According to Banana Bros., all you have to do is load the OTTO with your herb, add a ‘premium cone’ and press the power button. Within a few seconds, you’re rewarded with herb that is ground and rolled to perfection. You should find the OTTO available for $129 and the kit consists of the following:


  • 20 Premium Cones
  • A measuring cup
  • 4-in-1 cleaning tool
  • O-Funnel attachment
  • O-Tube cone holder
  • Fresh seal cone tube
  • USB cable designed for fast charging
  • Snap cap


The OTTO Grinder is larger than you might imagine but is in no way cumbersome. It is travel-friendly because of the relative lack of parts in its lightweight design. The sleek, minimalist design results in a discreet device that you can place on your coffee table. If you are a regular traveler, you will be relieved to discover that the OTTO is easy to break down and store away. It features only two pieces in total apart from its accessories.

We were delighted to find that OTTO is compatible with every kind of cal-king sized cone. The 20 Premium Cones that come with the device are made from 100% all-natural raw fiber, free from chemicals and GMOs. Every cone offers a slow & even burn with natural aroma and flavor. The cone is designed with a wide lip so you can fill each one to the brim. Since the hand-rolled design guarantees an even burn, the ensuing flavorful and potent smoke is a joy.

The OTTO usurps its plug-in grinder rivals by being wireless. It is also possible to charge it via USB cable. You can power it up from your wall outlet, computer, or car. It features a built-in lithium-ion battery so you can get up to 20 rolls per charge. The device takes 45 minutes to charge fully.

How to Use the OTTO Grinder

The purpose of the OTTO is to help you grind and roll your weed seamlessly in a matter of seconds. It includes a spring-loaded grinder that does an excellent job mimicking a person’s hand movements. When the machine grinds your marijuana, it will adjust the grind according to the size of the granules. Your material is ground down to the ideal consistency and loaded automatically into one of the premium cones. The high-grade metal teeth ensure even the clumpiest cannabis is perfectly ground.

When using the OTTO, determine how much weed you need with the measuring cup. For most users, it is probably a joint’s worth. You will need more if sharing with friends or using marijuana for cooking. Here’s how to use your OTTO:

  1. Press the side latch, and the device pops open to expose the loading chamber.
  2. Insert your herb.
  3. Once loaded, place one of the cones into the tube and attach it to the grinder.
  4. Press the power button to begin the grinding process.
  5. Within 10 seconds, you can twist the cone to separate it from the OTTO and take out your filled cone.

You can also use the OTTO for regular grinding without inserting a cone.

  1. Open the device to expose the loading chamber.
  2. Place your herb inside and close the device.
  3. Attach the O-Funnel and press the power button.
  4. After the grinding process is finished, place the marijuana into the container of your choosing.

Banana Bros. couldn’t have made it any easier to use the OTTO. There is only one button, and loading & unloading the device is straightforward. While other electric grinders suffer from ‘weed jam,’ this simply isn’t an issue with the OTTO. If a jam occurs, its SMART technology enables it to readjust. It can power its way through without overheating the device.

Analyzing the OTTO’s Grinder’s Performance

‘Absolutely exceptional’ just about covers it. You will get a perfect grind every single time, and better yet, it happens with zero input from you. There is no need to make adjustments or tune settings. It is also an efficient device because you waste very little weed during the process.

It is an excellent product for vapers because it grinds the weed so well that you can load less in your chamber. Remember, the finer the grind, the greater the surface area covered. However, vape users will find that it is trickier to transfer the herb to their vaping device than it is to the cone. This is because of the O-Funnel’s large mouth. Therefore, it is best to empty your ground weed somewhere else and transfer it to the vaporizer’s chamber.

We also recommend cleaning it every couple of uses and performing a complete clean every ten uses or so. Otherwise, resin from your marijuana will get stuck in the chamber.

Where Can I Purchase the OTTO Grinder?

The best place to buy the OTTO Grinder is on the official Banana Bros website. You can also buy it on, and a variety of other third-party sites. However, you need to check the terms and conditions of these companies. They may have different shipping and returns information to Banana Bros.

The site allows customers to return unopened products within 30 days of purchase. Banana Bros subtracts the shipping costs from your refund. The brand only offers refunds for products purchased on its website. You also have the option to track your order online.

Final Thoughts About the OTTO Grinder

If you can afford $129 and are a regular weed user who hates grinding up the herb, the OTTO Grinder from Banana Bros is a worthwhile investment. Few electric grinding machines are more efficient. We have not located one that makes the whole process so simple.

Frustrating herb jams are a thing of the past.

The OTTO’s SMART technology adjusts according to your marijuana’s consistency. Loading your weed into the premium cones is simple in itself. As well as providing perfectly rolled weed for joints on every occasion, it also helps vapers get the most out of their devices. The subtle design and lack of annoying parts mean the OTTO is the gold standard for electric grinders.

Final Verdict: 9.5/10

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