There are four glosses on offer, one available with every two bottles of Diet Coke you purchase in Boots. I have managed to pick up two of the luscious glosses so far, Golden Nude and Glossy Pink:
They are super pigmented and not at all sticky on the lips but have great staying power, along with a lovely scent. I can't wait to pick up the other two colours, Pure Plum and Lacquer Red which are perfect colours for autumn/winter. Whilst I did love getting some Nails Inc. with my Diet Coke, they seem to be giving them away left, right and centre in magazines at the moment, so a gloss is definitely a welcome change for me.
Make sure you pick one up whist they're still in stock!