Unless you take the time to screw it on perfectly...it leaks
I bought this shaker for my daily meal replacement and am upset that unless I take the time to make sure all the grooves in the lid match up perfectly (it usually takes a few tries), the lid will leak. Being in a rush in the mornings to get out the door, it's very frustrating to have to spend the time it takes to make sure the lid is on perfectly. If you just screw it on really quick, the grooves won't match and it leaks. I doubt this is the seller's fault. All the other reviews are GREAT, which is why I bought it. I think I just got a faulty lid or base.
Rating: 3 stars