4 Pcs Plastic Shaker Balls, Protein Shaker Ball Replacement, Suitable for Most Bottles, Stirring Various Drinks

These work with my thicker shakes and my oats overnight. The powder, the oats, the chia seeds or whatever else is used that day do not stick in the little crevices. They do a good job of agitating the bottles' contents and getting everything mixed. They are around the size of a golfball. And due to their size and design, even if you do leave them in your bottle with the lid on and you drink through the mouthpiece they won't come out but the shake can still come through. They are very easy to wash. I've only handwashed but I don't see why they can't go in a dishwaer. Although, maybe you'd want to put them in a washing bag or cage because the water pressure may make them bounce around, lol! I only had trouble with the hand washing one time with a chia seed but that was my own fault for leaving it too long.

As others have stated, they do float, but I don’t find it impedes the flow of my drink. Would buy again.

These were perfect

Right size, but they float in water.

Many of my meals are powdered soylent so I have a lot of shaker bottles and they all came with the metal coil spring shaker balls, unfortunately my dishwasher has limited space and stacking those spring coils close to each other often results in them becoming difficult to separate so I purchased these solid plastic shaker balls. This allows me to use my dishwasher more efficiently by letting it completely fill up before running it.

A few of my old shakers did not have these. Ordered them and have used them and they work like my other shakers that do.

These not only do what they say they’re going to do, but they work even better than the typical spring mixer ball! I love that they are affordable, colorful, AND actually work!! I saw other people’s reviews that complained about how these balls float, but they failed to mention that even though they do float, THEY STILL WORK PERFECTLY FINE!!! I highly recommend these over the spring mixers.

I bought these to replace the metal ones I couldn’t find for my Blender Bottle, but I found they work well in any bottle and are great for keeping iced coffee mixed.