The metal ring in the lid just unglued the second day. Shaker still does its function and has good quality but you have to remove that part.

It worked great for a while, the built-in mixing blades on the inside worked great to shake mix without the need for a rattling mixer inside. Unfortunately, after a few weeks the aluminium ring around the plastic lid came away, as it's just glued in place, if this was the only issue, it would have been fine. The glue on the plastic was unsightly, but it still worked. Then as many others have reported, the cap tore at the lid. For the repeated use of being stoppered and unstoppered the plastic is too thin and it eventually just tore away with the cap still inside the top.

It looks really cool I like it but after using it twice top lid just ripped off I am not really happy about the quality of the plastic on this product.

Great shaker use every day. Easy to clean, does exactly as what it says in the products description 

you should definitely go for it its nice, leak proof and its easy to clean.

Simply good shaker for making protein shake.

I purchased for the first time and my experience is really good. The protein shaker is of good quality further the protein is great.

It is really made-up of 100% stainless steel. I can undoubtedly drink warm in this shaker which I missed with my previous plastic shakers. Overall I am satisfied with the product. I wish 'my protein' would continue come-up with so useful products like this metal shaker.

Really keeps the beverage  temperature inside for a long period of time, you might need help with a mixer tool inside ( ball), for some type of protein shake.

I got this shaker free with my last purchase of Whey Protein. I find this shaker much much better than the last plastic shaker which I owned. The whey protein gets completely dissolved in no time. If properly closed there is no leakage also. So thumbs up to this product. It is a good product