Great shaker bottle!
I have been using this shaker bottle for over a year and 1/2.  I took the advice from a review to "not squeeze the sides while shaking" to prevent leaks. "Instead press down on the top and bottom of the shaker while you shake it."  This has worked perfectly for me for the powder supplement I take daily that I mix with water.  It mixes in only a few seconds and it is plenty large for what I need.  I'm glad I didn't spend more money on some fancy shaker bottle that really isn't necessary for me.
Rating: 5 stars