Recommendations for BIFL containers to purchase now?

I do the same. I really believe it relates to how individual brains work. I have learned a lot about working memory and short term and long term memory. It makes so much sense when I look at how I remember things. If anyone has recommendations on a book that helps explain the brain and mental exercises that we can do to help the weaker parts, please let me know. If I need to be a scientist to read it, please don’t recommend.