I read the comments below about the bottom of the electric blender bottle coming off, and thought that was odd! I have three shaker bottles, one with a wire ball and another with a piece right under the lid for the purpose of breaking up the particles when shaking. The one with a piece directly under the lid is horrible, the one with the wire ball is quite good.
So far, this one with the mixing blade is the best! Not only does it blend well, but the BEST electric blender bottle is made of plastic that is fully compliant with baby grade regulations.
My husband uses his portable blender bottle at the gym to make protein shakes. He paid over $10 for them and they’re only half the size of the ones I bought! These best portable blender bottles were on sale for only $25, a really good deal!
They can be used for hot and cold drinks, and I like to use them for cold drinks! And yes, I always mix it up and add ice to it! But you can’t put it in while it’s mixing, it’ll damage the plastic blade! I will definitely buy these portable electric protein shaker bottles again!