If you are in need of a high quality shaker cup, the 800 ml Perfect Shakers is the perfect solution to what you are looking for. Being a surgical stainless steel magic ball mixer, it has an extra wide mouth with a stay-open flip cap and fits in most drink holders. Amazingly, it has a screw-on lid without rubber seal but 100% leak free. Not just for mixing your energy drinks before running, you can use this handy shakers for dressings, gravy, cocktails etc. way after running.

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