I love this thing, its a little handheld vacuum, that works with these special Reynolds bags.. Basically – you put the stuff in, seal the top, press the vacuum on a flat surface on the special one way vent, and suck the air out.. And it really gets all the air out! I tried it with coffee, and the initial seal was perfect, but once you get even a spec in the top seal, this thing is done.. Its better for veggies, meats, solid things (not granualar stuff). Available at your grocery store – (and its very reasonably priced too!)