My friend ordered a bottle of argan oil from me. I googled on how to mail the glass bottle safely and found out a link how some unusual mails had been put into the mailbox (in the US). Among them is a mail made out of plastic bottle. This would be perfect to house a small glass bottle inside. With some padding or fillers, the plastic exterior will protect it.
On further Google-ing on how to make one, this is how it turned out. You make a window on the side and the cover it up with some decorations. It'll be fun for the recipient to guess on how to open up the packaging. Mine was just done with a sticker. 😆