Express or Priority Mail ShippingExpress MailUpgrade your order to Express Mail shipping. It does not guarantee overnight delivery but it is the fastest delivery available to us (1-2 days). There is a $27 charge for this upgrade. Priority MailTwin Packs and above already ship Priority Mail. To upgrade a small bag or a big bag order to Priority Mail it’s $8. Priority Mail normally arrives in 2-3 days depending on where you live.