A protein shaker bottle is a type of sports bottle used to mix protein powders and supplements with liquid. It typically consists of a plastic bottle with a tight-fitting lid that features a mixing mechanism inside. The mixing mechanism is often a wire whisk ball or a mesh grid, which helps to break up any clumps and create a smooth, lump-free mixture.

Protein shaker bottles come in a variety of sizes and designs, with some featuring additional compartments or storage areas for supplements and snacks. They are popular among athletes, fitness enthusiasts, and people who follow high-protein diets, as they provide a convenient way to mix and consume protein shakes and supplements on-the-go.

The bottles are usually made of BPA-free plastic, which is durable and easy to clean. Some may also have insulated walls to keep drinks cold or hot, and may be dishwasher safe for easy cleaning.

Overall, a protein shaker bottle is a must-have for anyone who regularly consumes protein shakes or supplements, providing a convenient and portable solution for mixing and drinking protein drinks.