Sealing in freshness September 6, 2013 Editorial Staff Photo by Jason Kaplan Emily Thomas shows Judi Leigh, Ilona Velasquez, and Louise DeCesare how to pack tomatoes into a jar, leaving little space for air, during a canning demonstration at The Grail on Saturday. Photo by Jason KaplanJudi Leigh, Ilona Velasquez, Emily Thomas and Louise DeCesare pack tomatoes into a jar, leaving little space for air, during a canning demonstration at The Grail on Saturday.