Formula X Bottle Service Set ($36.50; sephora.com) is a limited edition, 10-piece mini nail polish set, Sephora Exclusive, with a mix of shimmers, creams and neutrals that come packaged similar to a champagne bottle. The colors are from Sephora’s Formula X range of nail colors. The formula on these were really nice, but the mini brush was a tad difficult to work with. The consistency was neat, quick to dry and quite glossy. The cremes especially were quite opaque and some of them needed no more than one coat. The formulation is three-free and the colors, while not the most unique, are still great classics to have in any nail polish collection. I love the champagne bottle packaging too, makes for a great gift without having to even wrap it up!