Martell Blue Swift Identification:

1. Label: The label should have the name "Martell" on it, along with the words "Blue Swift" underneath. The label should have a blue color scheme with gold accents.

2. Bottle: The bottle should be a clear glass with a blue tint. It should have the shape of the traditional Martell Cognac bottle with a round base and tapered neck.

3. Seal: The bottle should have a seal over the cork with the Martell logo printed on it. The seal should be red and gold.

4. Age: The age of Martell Blue Swift should not be older than 3 years. This can be found on the label or on the bottom of the bottle.

5. Taste: Martell Blue Swift is a VSOP Cognac that has been finished in Bourbon casks. It has a fruity and floral flavor with hints of vanilla and cinnamon.

Overall, to identify a bottle of Martell Blue Swift, look for a clear bottle with a blue tint, a label with the name "Martell Blue Swift," a red and gold seal over the cork, and a fruity and floral taste with hints of vanilla and cinnamon. Its age should not be older than 3 years.