Protein Shaker Bottle, USB Rechargeable 600 mL Vortex Mixer, High-torque Tornado Shaker Cup, Portable Stirring Blender for Powdered Supplement Shakers. BPA Free, Guaranteed Leak-proof.

I don't usually take the time to write reviews, but I took a chance on this buy, so I had to make an exception. The bottle looks awesome, feels very durable and well made, and mixes my preworkout/protein in seconds (and does so very quietly). It came with a full charge, and I've been using it twice a day for a week, still haven't had to recharge it yet. Simple to clean. You can't go wrong with the Ironsmith mixer.

I am disappointed that this bottle failed with the first use. I had read that people were using it for Bulletproof coffee, which is all I wanted it for. Everything went great until I picked up the bottle from a coaster on my desk, and everything came out at the joint between the plastic and the base that holds the battery. I DID NOT use boiling water. Yes, it was hot, but not boiling. Bummer. I have tried two other self-stirring cups and one was just too small and the other started falling apart with the first use. I had hoped this Promixx would be perfect, but . . .

When I first got this product I used it for mixing up energy drinks, so more of a light powder compared to the protein shakes, but I figured this was heavier duty since it is listed as a protein shaker bottle. The mixing pieces worked really well and I used this product a lot. Fast forward a month or so and really, the product is just so-so. Sometimes the stirrer gets jammed from starting and I have to give it a little twist below the bottle to get it going again. When you use a thicker powder, it really struggles. The battery seems to last well, however. Also, there's a bit of a design flaw around the drinking spout. There's no easy way to drink what you've mixed up, it just ends up being awkward. Plus, with the way the spout is designed, you always get some remnants jammed in the corner between the spout and the upper rim of the lid, which is difficult to wash out by hand. In the end, it's decent at what it's designed to do but I don't feel like I got my money's worth. If you keep using it with light powders, you might be ok. But it might jam like it did for me, and become more trouble than it's worth. So....your mileage may vary.

Works well but like most of these that charge via USB, they need to be plugged in all the time. If not plugged in, it will only blend for a few seconds at full charge. Mixes great though and would recommend it.

I was using this to make my Bulletproof coffee, which it says it will do, but the part at the top where the metal ring is right under where the lid screws to broke the first week I had it. Blender part still works. I just have to make sure to not put a lot in since the lid can't screw on properly anymore.

Awesome product ! I was a little worried with how it would mix my thick protein power but it blew my mind how it mixed it perfectly. I think the biggest benefit is how easy it is to clean, no need to wash in the dishwasher every time like a shaker bottle. Just throw some liquid detergent in it and hit the button... then it's clean ! Super Easy. It's totally worth the price. I will be throwing away my blender bottles. I highly recommend this product to anyone. Great gift too !

Great to mix with pre workout powders. I wasn't sure how it would hold up with thicker protein powders but it blended smoothly and no clumps of powder were left. The lid on the top seals so the cap won't pop off and the base comes off so you can clean the bottle easily, love it!

Extremely cheaply made. Battery doesn't hold charge. Hard to line up gears. Good idea but this one is cheap. Also the gear on the on the battery broke fell off. Returning item after writing this review. Gave one star otherwise I could not submit review.