Frey Scientific Human Genetic Sodium Benzoate Taste Paper allows you and your students to determine their own genetic taste responses. The taste of this paper can be sweet, salty, bitter, or even tasteless depending upon the genotype of tested individual. Ready-to-use sodium benzoate coated paper strips are an easy and fun way to study genetic transfer of dominant and recessive genes, random segregation, and more. It is sold as 12 vials with 100 strips in each vial, totaling to 1200 strips.