ALLMAX Leak-Proof Shaker, Black/Red, 25 oz (700 ml)

I've used shaker bottles with metal mixer balls for quite awhile and was curious to see how well a shaker without one would fare. I've used this bottle to mix my protein whey with water and surprisingly, it mixes very well. It produces a consistent mix without any clumps and since it doesn't have a mixer ball in it, I don't feel a ball colliding with the insides of the shaker bottle which makes it slightly quieter other than the sloshing of water. The cap also seals very tightly as it is a nub that is pushed into the drinking nozzle and not just a flat cap that's pressed on to it, ensuring that the contents will not leak as well as ensuring that the cap will stay secure after numerous openings. The plastic is good and solid, no flexing was felt. All in all, I like this product and do recommend it if you're in the market for a simple shaker that works and will last much longer than cheaper alternatives.