Banana Bros. OTTO Automatic Grinder and Cone Filler

7 reviews
$ 179.99


$ 179.99 $ 179.99


Color Blue

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Electric Grinder and Roller

The OTTO grinder is the first and only automatic cone filling machine. Whether your material is sticky, moist, dry, or full of stems, it's an electric weed grinder that fills a perfect cone every time at the touch of a button. The Banana bros otto automatic grinder and filler provide a superior smoking experience with a smooth draw and no air pockets, paper runs, or waste. OTTO can also be used to fill bowls, pipes, or any stash container.

When you click the OTTO on is performs the same smooth grinding motion that dumb old human hands do with precision and care every time. Once it detects it has ground up all of your nugs it opens its hatch and shakes to deposit your freshly ground weed in a pre-rolled cone perfectly shaped to your specifications.

The OTTO is a good automatic joint rolling machine because it doesn't replace anyone's job unless you consider your manual grinder a person. It's basically an automatic joint filler attached to a funnel. Amazingly, it works, and you will want to roll way too many joints. Technically it doesn't roll the cones, they got another robot to do that already at the factory. The Banana Bros grinder is worth it if you want all the work of having king-sized joints done for you.


  • Aerospace Engineered Aluminum Milling Plates
  • O-Tube Sachet and Cone Holder
  • O-Funnel dispenses your product into your choice of container for the perfect joint
  • 2 x 3-Packs of King-size Banana Bros. Premium Cones
  • 4-in-1 Cleaning Tool
  • USB Charging Cable
  • Measuring Cup shows exactly how much material to use
  • Snap Cap to keep OTTO clean when not in use or on-the-go
Customer Reviews
4.4 Based on 7 Reviews
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Filter Reviews:
Nicole B.
United States United States

Doesn’t work that great

I bought this for my wife for Christmas and she’s used it a few times now how the instructions say and it does not load the cone well. The beginning of the fill by the filter never gets enough, even when tamping the machine down like it says. It does grind well, but at this point I feel like I paid $175 for an electric grinder.

Rick C.
United States United States

Great product

I really like the ease of rolling with this machine.

Timothy W.
United States United States

Excellent product, fun to use

Didn’t really know what to expect when I ordered this. I’ve had other pre-roll devices that were decent at best. This is way better than any of those. Really great design, incredibly easy to use. Really impressed with this, especially the gold edition

Linda B.
United States United States


I’m loving this! I have arthritis and can’t really roll my ‘ joints ‘ This is a real game changer Thanks