Be it a buffalo, cow, or ox drinking horn; it is made in the same following steps mentioned below.
• The horn's inner core is first removed by boiling the whole horn, and then the softened marrow is scraped out.
• Later the extracted core is softened using heat and pressed to form its desired shape.
• Once the desired horn is formed, its coated with the formulated food-safe water-based coating and polished to a light sheen.
• It's then fitted with the opted metal design or carved with etchings.

Read more this post visit this link: https://foujihandicrafts.com/blog/viking-drinking-horn/