Seaweed

 is one of the ingredients needed to Craft glass. can be obtained by Fishing with a Big Net or from several spawns on Entrana. Seaweed mush then be cooked on a range to turn it into soda ash. To make molten glass, use the sand on a furnace with soda ash in your inventory. The molten glass can then be blown with a glassblowing pipe to create one of the following:
 * Beer glass
 * Vial
 * Glass orb