Completed contest

Male/Female SEROTONIN party t-shirts

ltroy04 needed a new t-shirt design and created a contest on 99designs.

A winner was selected from 36 designs submitted by 13 freelance designers.


One of the designers who made it happen

Winner - rudyy
Thanks once again to 99designs and specifically to Rudyy and the rest of the dsigners who spent time working on this logo. My clients will go on to invest hundreds of thousands of dollars on the brands who now have proud new logos, thanks to this great platform. Best regards Warren Jacobs
- Warjacobs

How ltroy04 started their t-shirt journey

Brand name

Onnit Labs LLC


We are Onnit Labs,, a supplement company that sells a product that boosts serotonin for people who are partying, staying out late, going to raves, and taking bad things ;).

Tell us a bit about who you are and the people you reach

Guys and Girls 16-35, who would be going to raves and listenting to Deadmau5 and Bassnectar etc.


I need a pair of T-shirts. Both T-shirts need to have the brand Onnit Labs on them somewhere, and both have to do with the topic of Serotonin. These T-shirts should be stylish and playful, not bold and boring. I am thinking white t's, using glow in the dark printing that will show up in the blacklights.

Female Tee: This needs to have the playful message "I (heart) Serotonin" where the heart is the symbol not the word. Then of course it needs the brand Onnit Labs on it somewhere.

Male Tee: I want to use the chemical structure of Serotonin in a clever way, or as emerging from a pattern of sorts. It can include the word Serotonin or not. This shirt should be clever, and less obvious than the female shirt. Also needs the Onnit labs brand. One idea is to use our phrase "Are You Onnit?" and then have the serotonin molecule in glow in the dark underneath it.

The winner of this contest will be the one who is the most clever and shows the most current and fresh design sensibility.

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