Favorite beauty product/styling tool?

M • Loving life! ❤️✌️
Alright ladies just for fun, what's your favorite beauty product or styling tool? The one thing you couldn't live without in your glam regimen? You can only pick ONE!
Mine is the inStyler, yes that rotating iron you see on infomercials. I have very think curly hair and when I want to go straight or for a more polished look it's the best! Truly much faster than a flat iron or curling iron, I can go from frizzy curly to smooth and sleek in about 30min! I'm on my second one already, my first lasted almost 8 years before I dropped and broke it 😆