The Opi Prospa Nail and Cuticle Oil To-Go (£11) is the oil I keep by my bedside, thanks to the handy brush applicator. Before bed, I like to avoid that really oily, liquidy formula because it's not ideal having my Kindle slip out of my hands and potentially onto my face. This distributes enough oil to cover the entire cuticle, but with a rich formula that's thick enough that it doesn't drip down my fingers (and, if you were wondering, the formula contains avocado lipids, sunflower oil, sesame oil, and kukui nut oil). It's also relatively unscented, which I like since I use a heavily scented hand cream before bed, too.