Weird they used "vessel" because when I first returned to my current job from being employed elsewhere for 5 year we received an email about the organizations water "vessel" plan. They had received questions from employees about what it meant. They decided as an org to get rid of plastic water bottles in their vending machines. They said they were having cardboard water vessels in their vending machines instead.🙄 I always thought that was an odd term to use. This was in 2017.