As in France, water is safe to drink from the tap, and restaurants will happily serve this at no extra charge l'eau du robinet.
Fresh fruit juices are also very popular on the island along with jus de canne which is a delicious sugar cane drink which is often sold in vans in lay-bys off the main roads. This juice does not stay fresh for long, so ask for it to be made fresh while you wait and drink it as quickly as possible with some ice cubes and a squeeze of lime.
Martinique is famous for its world class rums and the island today still hosts a large number of distilleries inviting tourist to explore its history. Production methods emphasize use of fresh juice from sugar cane to produce "rhum agricole", rather than molasses widely used elsewhere.
Although rum is far more popular, the local beer in Martinique is Bière Lorraine.
Source: Discover Martinique (http://www.discover-marti...)