Where can I learn more/buy the FLEX Cup? Morgan Jones October 15, 2018 23:57 Updated Follow www.flexcup.com Related articles Where can I buy the Discovery Kit? What is the difference between the FLEX cup and other cups? What is the FLEX Cup? What is the difference between the FLEX Disc and the FLEX Cup? How do I insert and remove FLEX? Comments 0 comments Please sign in to leave a comment.