The Evak Mini Airtight Stash Jar is an innovative valve system that makes it so important in all storage requirements. The more air is exposed to your dry grasses and tobacco, the more quickly it dries up and gets lost. With the twin valves system of Prepara, you actually force air out when you press down when you push the rubberized top into the stash pot. This is better than an airtight cover since the air with your products will still catch the polluted air. You can access your dry plants or tobacco simply by squeezing them down, and by simply pulling them up. It doesn't get any easier with just two steps. The jar itself is available in four sizes: 8 grams, 28 grams, 50 grams, and 80 grams. The base of the glass is also safe for dishwashing. Keep everything you store as fresh as possible, not just airtight!