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Plump + Juicy Lip Booster Buttery Treatment

A buttery treatment packed with concentrated fatty acids and lip-boosting actives for your smoothest, most cushiony lips ever.

15 g

Why you'll love it

  • Visibly reduces the look of fine lines for a soft, cushiony pout
  • Smooth, buttery texture feels like a dream — never sticky or waxy
  • Restores lips and promotes moisture retention

About this brand

Kosas quite simply takes our breath away. It’s a gold standard for luxe, hydrating, better-for-you ingredients combined with a sense of color and beauty that only an artist could dream up.

Sheena Yaitanes, a painter who studied biology, chemistry, and art history, founded this exquisite brand (pronounced ko-shas) in 2015. She uses a color-mixing technique favored by master artists to create what she describes as “elevated color cosmetics.” Her painting background guides what pigments to use and how to match skin tones to the right products.

  • Luscious products, especially lipsticks and blushes
  • Shades picked artfully to match either warm or cool skin tones
  • Designed for women on-the-go – can be applied in the back of a Lyft
  • Free of parabens, phthalates, BHA/BHT, mineral oil, propylene glycol, polyethylene glycol, phenoxyethanol, fragrance, petrolatum, vitamin A, retinoids, and retinoid derivatives
  • Name “Kosas” reflects the five interconnected layers, or “kosas,” of the self: the physical, energetic, mental, intellectual, and soul
  • Based in Los Angeles, California

From Kosas:

“We source ingredients for two reasons: extreme nourishment and supreme luxury. We choose only the ones that deliver both.”

All Kosas products are:

  • Gluten-, egg-, nut-, and soy-free
  • Leaping Bunny certified cruelty-free
  • Botanically-rich makeup that acts as skincare too

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picture of Plump + Juicy Lip Booster Buttery Treatment

Key ingredients


Visibly firm and smooth the appearance of lips

Plump Oléoactif

Plumps and strengthens

Hyaluronic acid

Locks in hydration for a softer pout


Bis-Diglyceryl Polyacyladipate-2, Ricinus Communis (Castor) Seed Oil, Butyrospermum Parkii (Shea) Butter, Polyhydroxystearic Acid, dl-alpha Tocopheryl Nicotinate, Ethylhexyl Palmitate, Simmondsia Chinensis (Jojoba) Seed Oil, Jojoba Esters, Tribehenin, Helianthus Annuus (Sunflower) Seed Wax, Punica Granatum Flower Extract; Butyrospermum Parkii (Shea Butter) Unsaponifiables, Ricinus Communis (Castor) Seed Oil, Octyldodecanol, Acacia Decurrens Flower Wax, Sodium Hyaluronate, Glucomannan, Polyglycerin-3, Sorbitan Isostearate, Trihydroxystearin, Polyglyceryl-3 Diisostearate, Foeniculum Vulgare Fruit Oil, Palmitoyl Tripeptide-1, Helianthus Annuus Seed Oil, Ethylhexylglycerin, Rosmarinus Officinalis Leaf Oil, Vanillin, Citrus Aurantium Dulcis (Orange) Peel Oil, Tocopherol [May Contain (+/-): Titanium Dioxide CI 77891, Red 28 Lake CI 45410]

Allergen info

Formulated without gluten-derived ingredients; ingredients may have been produced in a facility that also processes gluten-derived ingredients.

How to use

  1. Wear this lip treatment day or night for your smoothest, fullest, most cushiony lips
  2. If layering with lip color, blot excess before applying
How to use Plump + Juicy Lip Booster Buttery Treatment by Kosas
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Customer Reviews

Based on 151 reviews
Christina Salisbury
Love it so much!

I love everything about this product! I usually wear it on its own, but it also looks amazing on top of lip color. It’s not sticky at all, lasts a long time, and gives my lips just enough color for the minimal makeup days!


I love this product. It brings out the color in your lips and makes them look juicy. Hydration lasts forever. I keep it in my purse for touch ups on the go.

So moisturizing!

I love this stuff! It’s so thin yet moisturizing and it doesn’t have a weird smell. Highly recommend!

Unknown via kosas.com
The best

This is by far my favorite product from Kosas! I have very dry skin and lips. When they say a true hydration, they were not lying! It leaves my lips so hydrated and it feels like my lips are getting a drink of water when I apply it! It smells like orange Julius which makes me thirsty! Because it does have concentrated fatty acids etc, it almost breaks down your lip product if you apply it on top of lipsticks etc. so it’s definitely meant to apply on your bare lips. I would recommend applying this at night for a night treatment and before you apply any other lip product. This is my go to when I have really bad lip days, before a big event. The packaging is also adorable. The color gradient they chose for this product was perfect because of the flavor they chose for it as well. Beautiful product, a must have in your kit!

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