Preserving food, like preserving a friendship, requires conscientious care, an airtight bond, and a willing tongue to periodically taste-test for microbes. Savor sentiment with today’s Groupon: for $10, you get an introductory canning class from Seattle Can Can (a $20 value), taught at Goods for the Planet.

Seattle Can Can educates on the art of food preservation through a series of jar-jamming seminars designed to demystify basic canning customs. Freshmen provender protectors learn elementary canning principals and acquire the tools to tackle pickle-preserving projects during a one-hour introductory lecture. The relaxed class covers the history of home canning and acquaints students with canning equipment through trust-fall games. After the lecture, students can ask questions about techniques or when science will discover how to convert jam into living strawberries. Students also receive 10% off any canning supplies purchased the same day as the class.

Eager canners ready for the next step can take $5 off any one advanced class for six months after completing the introduction to canning course. The hands-on intermediate home-canning class lets students select their own fruits, vegetables, or vintage beanie babies to preserve using the water-bath canning method.