I think the basic requirement for a shaker is that it holds your shake well. However, this "PRO" shaker leaks when I shake it, so what's the point of it? I checked I locked the cap well, but it still leaks. The mini shaker which was given as a gift is even better than this, at least it doesn't leak and holds my shake well.

Received the large smart shaker without the foil over it and it was dirty.

I have experimented with several different shakers. None of which come close to this shaker on achieving a smooth consistency, if you shake for long enough you even get a nice little foam topping. The lid that fits over the spout is very tight- so make sure it is pushed fully down before shaking or you'll get in a mess.

So I was using another protein bottle with a metal ball to break down the powder, however this was still leaving me with bits in my mouth, however I brought this and I have never been left with any protein powder getting stuck between my teeth or anything, what’s great aswell is that you have these compartments which allow you to carry around your supplements without leaving it in the bottle which is really helpful to me as if I need to go to work and want to have a bit of my shake then I can pour a little bit in instead of bringing my big tub which is a pain, so This shaker is a great benefit for everything, please buy!

This is without a doubt the best shaker anyone could ask for, You can even mix the mega gainer shakes in this! Never leaks and the grate in the lid makes shakes silky smooth. 5* lethal job

There’s just nothing to improve about this shaker, it is the pinnacle. The extra storage is brilliant, the hexagon grate that fits onto the lid section is brilliant, everything’s brilliant. I haven’t had a single shake that hasn’t blended enough with this shaker. Highly recommend 5* unreal 

The 2 screw on compartments are so useful to hold pre workout and protein during the day! Saves you having to take tubs. 

Does the job, but the scale on the side is almost impossible to read when trying to measure out a liquid. Also the stopper is bit stiff to close completely.

It is quite easy to use and quite secure. Very portable too!

I've been reading reviews about bottles with scratches and not working properly, but my bottle turned out great and made my first shake with ease.