The Cleito is made of stainless steel (304) with a Pyrex glass tube and a wide bore Delrin drip tip, which is made of imported food contact Delrin material . Due to the TPD regulations we've added a new 2ml version for the Cleito tank. We now use a thicker glass tube than the orignal Cleito to comply. The rest of the components remain the same and with minimal fuss we can easily convert the Cleito to a 2ml tank to stay within the TPD regulations. Also available is the Cleito Fatboy extension tank which increases the Cleito liquid capacity to 5ml.