Leaves chunks of protein powder floating on top - the milk doesn't change colour like it does when I use a blender which I have since had to buy. Leaks a bit when shaken. Being a premium shaker I expected it to have a metal mixing spring in it like the cheap ones do but it just had a few plastic bars in the lid that don't do the job. Bad design. Also customer support were zero help and wanted photographic evidence which is a complete pain.

I have been using this bottle for probably half a year and the lid started to "worn out*. It has already been tearing apart, the lid doesn't look so strong to withstand long period of time. Now I have difficulty to close it and require to purchase another bottle. Other than that, I really like the stainless steel bottom half. It kept my beverage very cold if I want to, also good at withstand drops and hit by anything.

On first inspection the shaker looks really good quality, that opinion soon changes after a couple of uses, at which point the metal ring around the lid separated from the plastic (this happened on both shakers I have) and then the pop lid on the mouth pieces becomes very slack which leads to a nice flood in your gym bag on the way to the gym. 

Overall I really like this shaker as it's quite robust. I did notice that sometimes it might let go some of the liquid (probably doesn't seal all the time if you have some powder stuck on the seals). Powder shakes well but not great, sometimes leaves the lumps but I'm used to that The only disappointment is that it's not dishwasher safe and it's my own fault for not checking with the support, I'm kind of used to everything being dishwasher safe nowadays but after washing this the top metal cover has come off.

I got this item for free on my last purchase, and honestly I love it! The blender piece is in the cap if the bottle which i very convenient! Makes my pre and post work out drinks stay very cold!

I find it much easier to clean than a typical plastic shaker, also seems to stay cold longer to which is ideal in the warm gyms. 

Got this for free during the MyProtein birthday and I'm quite happy I did! Didn't think this would mix my shake well considering it doesn't have an external mixing bit but it does the job very well. I also haven't experienced any leaking, as other users say, after 3 weeks of usage. Very easy to wash and doesn't leave behind any lingering smell. Only negative I have is that the interior takes a long time to dry. Also maybe change the units to staple numbers of [ml]? Up the metal shaker!

I have many shaker bottles, here are some reasons why this is not a good product. 1. Metal is great thermal conductor - Hot water inside would burn your hands when holding it. Cold water inside will lose it's temperature faster, compared to plastic shakers 2. Leaky - There's not enough rubber on the lid to create a good seal. It is super difficult to perfectly screw on the top. 3. Logo washes off - This is normal, but I had the product only one week before the logo on the outside started to peel and fade. I love MyProtein but this product is not good for what it's meant to do. I now just use it as a drinking cup at home.

Looks cool. However the seal in the metal at the bottom split the first time I dropped it. I got a metal one because I thought it would be tough

Great for work as kept smashing bottles as they fell! Thought I would try this and within 2 uses the cap which flips open the bottle completely ripped making the bottle unusable. Very disappointed this occured, never had this happen on the other protein bottles in the past.