as the holiday shopping season kicks off, online purchases &ndash and shipping &ndash are expected to continue to grow. photograph justin sullivangetty images as the holiday season approaches, more and more purchases are happening online. online purchases are projected to grow 20.1 to hit 1.5tn this year, according to emarketer. as a result, mail packing is a burgeoning sustainability concern.aside from the plastic and cardboard wrapping the products come in, there are the boxes, the labeling and the paper wrapping or foam packing meant to protect what is nestled inside.