They are vessels made in pumpkins from a plant known as Tecomate or Totumo with scientific name Crescentia alata. The fruits are dried and the pulp leaving a botija removed them. In Colombia we say gourds, Jiqueras. Tinajas or Mucuras and are used to transport water or liquids. They are characterized by a long, thin neck. The origin of the word is Nahuatl ( Tecomatl ). Also in Mexico say them jugs to pottery in the same way.