Picked this up at the local nursery. Never saw one until this one. Shotglass marked in tsp., tblsp, ounces, and milliliters. Made for HydroFarm and sells for $3.50, but if you admire it while standing there preparing to pay for your FF nutes, Soil, ammendments, etc they'll throw it in for free. I bought a 1 Gal water jug for my first couple grows.