These premium shaker bottles do not leak. I like the size of the side.
I think these plastic stirring balls can break down large powders better than my metal stirring balls. I stubbornly mixed the protein powder with marshmallows in it (yes, you read it right), until I used these premium shaker bottles, I couldn’t successfully dissolve the powder.
About the powder storage room: Before packaging the powder, you can always put a part of the powder into the bottle itself. But if you are going out for a long time, you may need a second meal, you can use the powder storage room. I can put the powder in the compartment in case I forget to refill the premium shaker bottle.
The durability of these premium shaker bottles is moderate. In general, they seem to be of good quality at the current asking price.