BluePeak Protein Shaker Bottle 20 oz with Dual Mixing Technology, Strong Loop Top, BPA Free, Shaker Balls & Mixing Grids Included - On-The-Go Small Protein Shakers (3 Pack - Black, Yellow, Pink)

Does tend to leak when I drink out of it without a straw.

I love the size of these cups. They work great at mixing protein powder and I use them to mix flour and milk for gravy. Just a few vigorous shake and it's mixed with no clumps. I have ordered additional sets.These are easy to clean, however they do slightly retain the smell of some things, like an electrolyte powder I use. I can tell which cups I have used for that. I still give 5 stars because they do not leak, and I love the size!

Excellent cups. They definitely do not leak. Perfect size and mixes drinks well. I did see some negative reviews on cracks or leaking, i did not experience either issue, maybe just something happened in production, but im sure the company wants to please the customer, im sure its not their intentions to send any thing out that does not function properly. That being said it truly is as advertised.

Well I got the package and the first time I used one of them the top cracked when I shook the drink. Not very easy to clean - but I keep using them so it's not that bad - I'm just short a top noe

So great!! Fits a muscle milk plus fiber plus collagen and ice! The screen keeps the ice out while the beater plastic ( so great without the wire one , such a pain to clean) mixes perfectly without endless foam!! I purchased 2 sets for the cost of 1 large mixer cup.

I bought this shaker bottle a while ago to take to the gym and everytime I use it, its always leaking. Also its very anoying and frustrating that the mixing grid is always getting stuck to the cup itself once I close the lid and open it up. Disatisfied with the product.

Speedy delivery, no leaks. I can't figure out how to take apart the top part to clean, but it's still great. A drop of soap amdahake it up and the top still gets clean. I needed something with no metal and this does the job perfect.

The sizing on the packaging is incorrect. It says 20 oz bottles but if you try to add 20 oz of liquid (I tested because 12 oz on scale was at more than 3/4 full), the bottle overflows. Considering you need space to add the powder and be able to mix, the bottles should at best be called 15-16 oz bottles. The mixing ball does ok but not great for breaking up clumps off powder. The screen in the this smaller bottle seems to trap the powder rather than help mix it. That seems to be an artifact of the inappropriate bottle size.On the bright side, customer service is great. I did email them my concerns over the false advertising of bottle size and they sent me a set of their larger bottles (28 oz) for free. The 28 oz bottles I would consider to actually be 20 oz bottles for the same scaling issues as described for their “20 oz” bottles. They are definitely the size of the 20 oz bottles of other vendors. In these larger bottles, the screen does help mix protein powder shakes much better than their ball alone.