The lipstick is light pink and comes in a magenta container.
Role in episode
Pearl claims glitter gloss to be the greatest thing she has ever seen. When Mr. Krabs sends SpongeBob to buy what Pearl wants for her birthday, SpongeBob buys a container of this lipstick with Mr. Krabs' credit card. However, Pearl forgets about it when she sees something better, making SpongeBob think he had bought the wrong present.
SpongeBob buys it and gives it to Pearl for her birthday along with many other things.