- Product Review (submitted on January 3, 2018):
- I have had the original with the little disc. I also have currently the more recent version of the shaker container. Those do have an insert with one side open and one side with slits in the plastic. They actually work for mixing my protein shakes with added Benefiber. This looked like the older version so I would have thought it would have the disc. As for the explosiveness, I found that to be true with warmer liquids. The pressure will build and explode. Or carbonated anything will explode.