Coconut water, the clear liquid found inside the cavity of each coconut, is a popular cooler in Malaysia's hot and humid climate. "Gula melaka" is unrefined palm sugar produced from the sap of the coconut flower. It is the most traditional sweetener in Malaysian cooking and imbues a rich caramel-like flavour with a hint of coconut. Coconut fronds are traditionally used to wrap food, hollowed out coconut husks and shells may be used as a source of charcoal fuel for barbecued meats and traditional pastry making, and even the apical bud or growing tip of the coconut palm is a popular delicacy served in rural communities and specialist restaurants. Soy sauce of different varieties is another important ingredient. Light soy sauce contributes its pleasantly salty flavour to a variety of stir-fries, marinades and steamed dishes. In some hawker establishments, freshly sliced or pickled chillies arrive immersed in light soy sauce to be used for dipping. Dark soy sauce is thicker, more intense in flavour and less salty. It is often used when a heartier flavour is desired, particularly with "masak kicap" (a style of braising with a blend of soy sauce varieties) dishes, and also to darken the color of a dish. Kicap manis, sweetened soy sauce sometimes flavoured with star anise or garlic, is also a popular seasoning for cooking. The sweet and savoury taste of kicap manis also functions as a substitute to approximate the combination of dark soy sauce and thick caramel sauce, which is primarily used to colour and season stewed dishes. Common herbs include lemongrass (), a type of grass with a lemony aroma and flavour. Young, fresh stems are more desirable as older stems tend to acquire a woody texture: the tender white part closest to the base of the stem is thinly sliced and eaten raw in salads, or pounded with other aromatics to make a "rempah". It is also used whole in boiled and simmered dishes. The pandan (screwpine) leaf is the Asian equivalent of vanilla in Western cuisine. The subtle aroma is released when the leaves are bruised by tying one or two long leaves into a knot, and used for cooking curries, rice and desserts. The leaves can also be used to wrap items like rice, chicken or fish for cooking. Pandan leaf is also available in liquid essence or powdered form to flavour and colour cakes. Turmeric () is a rhizome popular for its flavour as well as colouring properties.