The Weider Shaker is very tight, I use it for several months and he has never been a leak or the same. One problem, however, is that the table for the content is the same color as the rest of the shaker, so black. The result is that the numbers are hard to read, only if direct light falls on it you can see it. How could not notice these errors in the production is a mystery to me. Therefore, I can not recommend the Shaker unfortunately. MfG
