I love this thing.
It’s not bulky, has just enough battery power to mix my powders and even makes cleanup easy (soapy warm water, let spin to clean).
And the bottem spins iff a little to easy for my liking but other wise a good bottle to have !
I like the fact that I don't have to manually shake my cup but the bottom has a roundness to it and it's not so pleasant to use the lid to drink out of.
This is a great product and perfect for my needs...except for the leak at the base which is a pretty fatal flaw as it leaks right onto the battery case.
Worked great at first, but after 2 weeks of using it daily, the base started to leak and the button to turn the motor on/off malfunctioned and would was hard to turn on or off.
Motor is very weak and barely turned shake at all.
I bought a few moths ago the same brand and it works properly, so I decided give this one as a gift to my girlfriend, disappointing, She changed the battery twice and still weak and not blending the powder.
Not very powerful.
This product is bad, not the way I expect I do not recommend spend your money on thisNever.