Nail polish users who want to try OPI's metallic and shimmer shades without committing to full-size bottles, or who are shopping for a small nail-polish gift. The 3.75 mL mini bottles also suit travel bags and manicure/pedicure kits.

The set gives you four different metallic finishes — Cyber Cherry on Top, Cyborn Again, Y2Slay, and Metallic Rewind — from a single purchase, so you can try several shades before buying a full-size 15 mL bottle of a favourite. The lacquer is applied with OPI's Pro-Wide brush for even coverage and is formulated without formaldehyde, toluene, DBP, camphor, parabens, ethyl tosylamide, or triphenyl phosphate.

• Apply a base coat to clean, dry nails and let it dry.
• Apply one thin coat of the metallic shade and let it dry for 2–3 minutes.
• Apply a second thin coat for full colour opacity and an even metallic finish.
• Seal with a top coat to lock in colour and shine.
• Wait at least 15 minutes before exposing nails to water or friction.

Pros:

• Four different metallic finishes in one set, useful for trying shades before buying full size
• 3.75 mL mini bottles are easy to store or travel with
• Formula is free of formaldehyde, toluene, DBP, camphor, parabens, ethyl tosylamide, and triphenyl phosphate

Cons:

• Mini bottles hold less product than OPI's standard 15 mL bottles, so a favourite shade runs out faster with regular use
• Only one bottle of each shade is included, so there's no backup if one is used up or damaged
• Metallic finishes show brush strokes more readily than cream finishes if applied in thick coats