An appliance is provided that is able to vacuum and heat seal plastic bag members containing liquids such as sauces and soups. The appliance may take on a uniquely shaped profile to allow the liquid to sit upright within a bag during the vacuuming process. The appliance also preferably includes a pressure sensor to constantly monitor pressure inside of the bag during the vacuum and sealing process. This may help to prevent liquid from being sucked up and into the appliance.