Sippy Cup is a female character competing in Open Source Objects.
Sippy Cup is basically considered as a little sister to everyone, naive, innocent, and playful. She’s really emotional though, and tends to cry over the simplest of things. She often takes what people say the wrong way and becomes defensive about it. She always tries to help others, although she can’t do much. She usually gets in the way and makes a situation worse.
Sippy Cup is a translucent yellow cup with an opaque green top. Her nozzle is rounded rectangular.
Episode 1 - "Who the hell recommended Glowing Heart"
Sippy Cup makes her verbal debut pointing out the silhouette of Crayon Box. Sippy Cup is visibly absent for most of the contest until one safe spot is left remaining. After some goading from Phonograph, Sippy Cup stops having fun and begins looking for a way to untie the three balloons tied to her body. She releases one balloon, which stops Paintball's descent. The lessened buoyancy allows Sippy Cup to gently float down, making her the last competitor safe.
Episode 2 - "Your Opinion is Invalid"
Sippy Cup picks up Penny in order to partner with her for the challenge, and puts her inside of herself so she doesn't fall out. During the challenge, she runs around playfully for no particular reason, stating that “It’s fun!”, but the pair end up being safe.
- In terms of heights among all the contestants and hosts, Sippy Cup lies exactly in the middle.