Add to cart Liquid K2 Spray Online $200.00 Liquid K2 Spray Online . Our K2 Spray has been marked as an incense in colorless three ounce pouches or vials and labeled “not for human consumption”. Spice or bizarro liquid incense has become increasingly popular with high school students and young adults, in prisons because it was legal and easily obtainable from convenience stores, smoke shops, and online.