Board Thread:General Discussion/@comment-24189673-20131120064700/@comment-24282510-20140102075647

Lieutenant13 wrote: I have a friend that reads the manga online, and Kisuke and Mayuri have developed a pill for the captains that would prevent the Wandereich from stealing their Bankai. And the pills have Hollow powers infused in it.

Really need to read the manga yourself.

It was only Kisuke that made the pills which are made from a hollow more specifically a arrancers kai.