I failed to share the actual link to the 30 mil drum liners. All done for the season now, so pulled them out of the 55's, gave them a good rinsing, and store up in my pole barn until next year. So very easy. The initial plans more than 6 years ago was that as long as my drums were food grade, sap storage would be a breeze. In reality, who wants to scrub out a drum buried in the ground ... at any age! The rigid liners are the ticket, for sure.
https://bestcontainers.com/product/5...amless-30-mil/