Don't be fooled by today's free Splenda Zero liquid sweetener. You'll need lots of liquid in order to use this sample, not zero liquid. That is unless you're some kinda weirdo who enjoys drinking these concentrated drink sweeteners straight out of the bottle.
Truth be told, curiosity got the best of me once. One squirt directly into my mouth was all it took to learn that lesson. It was like 30 drinks worth of flavor all compacted into a shot. Thankfully I didn't need medical attention.