Going to the beach, a concert, visiting friends, hitting the road, or just chilling at home, stay real with the Vitavac! This Vitavac easily fits into your pocket or purse and is just the coolest little Vac! The Tightvac patented system is able to preserve goods for 1 year and beyond by allowing products to breath and degas. Almost all food goods are smell proof inside the Vacs , however some products like freshly roasted coffee and medical herbs may degas, leaking there odor. The 2 way valve allows gas build up to slowly escape – without letting oxygen in. This is one of the main reasons it can preserve goods for long periods of time.