Great product, very high quality. Initially got a one that has a loose runner gasket around the lid. Raised it with Sprintfit support and they quickly shipped out a replacement. Kudos to their support team. Happy with the purchase. The shaker doesn't feel fragile like the unbranded or private label ones I had earlier. Does the job for whey mixes but for other mixes maybe they should have given a steel mixer ball as an option.