Measurement of lifetime exposure to tobacco smoke was inversely correlated with the volume of temporal and frontal wattles
They include Propylene Glycol, food grade flavoring, Vegetable Glycerin, and Nicotine

Features & Benefits Observed Collection without privacy issues No Need for Restroom Collect & Test in One Step Fast & Easy to Read Result EMPLOYMENT & INSURANCE USE ONLY, NOT FOR CLINICAL USE Shelf life for T=Square is up to 24 months when stored at 40-86F Drug test results in minutes Saliva saturation indicator ensures sufficient specimen volume is collected Eliminates need for gender-specific observation Limits adulteration and tampering Slim, lightweight, convenient to store No special training required Clean, hygienic Economical No more Urine Collection Totally non-invasive T-Square Panel Configurations: Employment & Insurance Testing 5 Panel T-Square QODOA-156NTEUO-I AMP, COC, MET, OPI, PCP NO THC (Marijuana) QODOA-256EUO-I AMP, COC, MET, OPI, THC 6 Panel T-Square QODOA-166EUO-I AMP, COC, MET, OPI, PCP, THC QODOA-666EUO-I AMP, COC, MET ,OPI, OXY,THC QODOA-366NTEUO-I AMP, COC, MET, OPI, OXY, PCP NO THC (Marijuana) 7 Panel T-Square QODOA-376EUO-I AMP, COC, MET, OPI, OXY, PCP, THC 9 Panel T-Square QODOA-496NTEUO-I AMP, BAR, COC, MDMA, MET, MTD, OPI, OXY, PCP NO THC (Marijuana) 10 Panel T-Square QODOA-10106EUO-I AMP, BAR, COC, MDMA, MET, MTD, OPI, OXY, PCP, THC T-Square Oral Drug Test Forensic Use Only NOT For Employment Testing 6 Panel T-Square QODOA-266-I 6-Panel with indicator AMP, BZO, COC, MET, OPI, THC 8 Panel T-Square QODOA-186-I AMP

Patent and Trademark Office in 1870and the only one of the seven that has remained in continuous production in the U.S
As I say, this is my impression from all the bowls Ive smoked in System pipes from late System until now (and Systems comprise about 75-80% of my smoking time)