These glass attachments are official replacement parts for the Pulsar Sipper Vaporizer. Made from quality borosilicate glass, these cups harvest and deliver fresh vapors from your Sipper Vaporizer. These can be used with the Sipper's Auto-Fill function to draw vapor hands free; then it can be removed so you can sip at will. Sold as a 2 piece set so you can swap one out as it fills up and keep the party going!