I got my metal as a free gift with one of my recent orders. It’s awesome I use it all the time. It’s string durable and looks good. The best think is it keeps my protein shake very cold for hours. Highly recommend you get one. 

Terrible seal on bottle, the first time I used it, it leaked everywhere after shaking it. It is a nice bottle - light and ergonomic - but I would not buy it due to the above flaw.

Metal bottle is great, but lid leaks when I drink out of it.

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!