Going the extra mile doesn't necessarily include sending out personalized material. For a small price you can buy premade boxes in any colour that you'd like, still offering a premium feeling without costing you that premium price. Pick yourself a colour that suits you and your business, make it your own and make it part of your brand awareness program.
You have plenty of options for this, you can take a look at Amazon or ebay, doesn't matter if you're in Europe or America. If you have time on your side you can take a look at AliExpress even.
If you're European we suggest you https://buntbox.com/
For our American clients we suggest to go for https://www.customboxesnow.com/
When it comes to stickers and personalized cards you can't go wrong with https://www.vistaprint.com/
. They have offices all over the world: Europe, America, Australia and Asia.