OTTO Grinder: The Definitive Guide and Review

If you are relatively inexperienced but fancy smoking a joint, 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 important, 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 cut it up like parsley with the help of a chopping board, put the herb in a coffee grinder, and even use scissors with the weed in a shot glass! Alternatively, you can purchase a normal grinder, but they usually come in several pieces which are a pain to transport, and 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.

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 $129.95 and the kit consists of the following:

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


The OTTO Grinder is larger than you might imagine, but it is in no way cumbersome. In fact, it is travel-friendly because of the relative lack of parts 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, since it features only two pieces in total along with its accessories.

We were delighted to find that OTTO is compatible with every kind of cal-king sized cones. 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, I was delighted with the ensuing flavorful and potent smokes.

The OTTO usurps its plug-in grinder rivals by being wireless. It is also possible to charge it via USB cable, meaning 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 30 rolls per charge.

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. As a result, 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 most clumpy cannabis is perfectly ground.

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

  • Press the side latch and the device will pop open and expose the loading chamber.
  • Insert your herb.
  • Once loaded, place one of the cones into the tube and attach it to the grinder.
  • Press the power button to begin the grinding process.
  • 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.

  • Open the device to expose the loading chamber.
  • Place your herb inside and close the device.
  • Attach the O-Funnel and press the power button.
  • 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 to worry about, and loading & unloading the device is super-simple. While other electric grinders suffer from ‘weed jam’, this simply isn’t an issue with the OTTO because, if a jam occurs, its SMART technology enables it to readjust, and it canpower its way through without overheating the device.

The OTTO’s Grinder’s Performance

I can sum it up in two words: ‘Absolutely exceptional.’ 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 effective device, because very little weed is wasted during the process.

It is a great 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.

I also recommend cleaning it every couple of uses and performing a complete clean every 10 uses or so. Otherwise, resin from your marijuana will get stuck in the chamber.

Final Thoughts About the OTTO Grinder

If you can afford $130 and are a regular weed user who hates grinding up the herb, the OTTO Grinder from Banana Bros is a worthwhile investment. At the time of writing, I have not discovered a more efficient electric grinding machine, nor one that makes the whole process so simple.

Frustrating herb jams are a thing of the past, as the OTTO’s SMART technology adjusts according to your marijuana’s consistency, and 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 means the OTTO is the gold standard for electric grinders.

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