Being the smart queen she is, she's promoting her last release with it (playing Work It at the event, Killer monsteR as the name giver and theme she follows).
Great thing with Kuu is that she's only selling things she loves to use herself. Which is why she's also using her own stuff.
Here she's even saying she basically produced this for herself as she dislikes doing training outside of her work ( and loves eating

).
Probably the reason her products and also her merchandise is usually great quality.
She's also intoducing a regular day schedule for herself.
Having voice training, sleeping 8 hours every night and making breakfast/bentos for the family like she already mentioned in the past, good girl.