![voltrx Shaker Bottle](https://static.voltrx.com/2023/12/owevttTg-electric-shaker-bottle-16.jpg)
Why can’t the protein shake cup be washed with boiling water?
I recently bought a bucket of Optimum protein powder and a Shaker Bottle. There is no indication that hot water can not be used in the instructions for the protein powder. However, I saw such a warning in the Shaker Bottle. The above picture says To be very clear, please do not pour hot water […]