Inside is Ceramic on these instead of Calabash These premium handmade leather mate gourds are for the real "materos" looking to use only top products on the market. Coming straight from Uruguay, these mate gourds were created by top artisans in the most "matero" country of the world! The details are carefully analyzed and perfected to offer the customer only the best. The "virola", or ring, is made out of stainless steel to assure durability and quality for years to come. Offered in dark brown or black Due to the fact that no two mates are exactly the same, the size may vary. Bombilla sold separately