As a gym goer, I am often using much larger shakers than the Ghost - but Incan say without a doubt that it gets the job done! When filled with the proper amount of powder and water? You never have to worry about a loss in flavor. It holds ice as well as any other shaker I have used, and there is no leaks or spillage when properly secured. Great product!
I love the compact size of the Ghost Shaker since it's perfect for a single serving drink. I want to give it five stars, but there are some flaws in the lid that I'm not a fan of:
1. The cap doesn't seal all the way, so you have to squeeze it shut while shaking in order to not make a huge mess (but it still leaks regardless).
2. The material on the lid is prone to lipstick stains. If you wear lipstick regularly, I recommend buying a dark color.