1/2LB 1LB 2LB Customized block bottom aluminium foil resealable coffee bag in food packaging, customized flat bottom pouch with zipper, OEM &ODM manufacturer for coffee bean packaging, with food grades certificates coffee packaging pouches, Block bottom pouch with block bottom, they can be placed upright without any product inside,. It is easy to fill in. Which are well placed on the shelves of shops and coffee shops.  Regarding the block bottom of coffee bags, they are very easy to make, made of various materials like Kraft Paper with Foil, Glossy Finish Foil, Matte Finish With Foil, Glossy Varnish With Matte, Soft Touch With Matte. Usually we add a one-way valve on coffee bag, Do you know why we need to add a valve on block bottom coffee bag?  The small valves are a kind of modified atmosphere packaging (MAP) used in many industries. Which are very popular in the coffee market. Reasons as the follows: the one-way valve allows it to escape when the gas of carbon dioxide accumulates in the package, Meanwhile it can prevent oxygen and other pollutants from entering. A small piece of plastic attached on the front or inside of a coffee package. The valve will not interfere with the packaging graphics and function. Which looks like more than pinhole or a transparent plastic sticker there. It can keep coffee fresh because the valve is on the block bottom pouch.