Don’t worry! you can use a hand pump, which will pump out the air in the mason jar 【Vacuum Sealer for Jars Kit】 is made of high-density ABS plastic, BPA free, non-toxic and odorless Easy to clean by hand or in the dishwasher ,Sealer creates an airtight vacuum seal on the jar lid to keep food fresh and prevent odors and moisture for the safe storage of foods, such as jams chocolate sauce, rice, mustard and dry foods 【Food Saver Mason Jar Sealer Attachment】-5Pcs* Wide-mouth Jar Lids (86 mm) and 5Pcs* Regular-mouth Jar Lids (70 mm)More caps spare consumables, no extra money to buy, can’t open in time Sealed mason jar lids? The compact and delicate aluminum design makes it durable and easy to carry.