According to the 2020 Wine Business Monthly Closure Survey results, 66 percent of all wineries use natural cork to seal at least some of their wines, a slight decrease from the 70 percent reported in the 2019 survey results (Figure 1). At the same time, the survey shows reported usage of technical corks continuing to climb, while the use of screwcaps held steady. The big trend appears to be wineries switching some production from natural to technical cork. Eighty-four percent of wineries s...