When you're ready to vacuum seal, you simply place the open end of the bag into the vacuum channel, and it starts suctioning, no buttons required. One great feature is the indicator lights.

But, purchasing disposable bags can become expensive, and tossing the bag after every use adds to the landfill. Fortunately, making a reusable fabric vacuum bag with just a few supplies is easy.

and suction all of the air out of the bag with your vacuum. Then, just screw the cap back on. I was careful to replace the cap as quickly as possible so minimal air escaped in the interim ...