It seems like you're referring to a specific product or recipe, possibly a beverage, that includes ingredients like watermelon, lemonade, ice, and salt, with a volume of 30ml. However, "King Crest" is not a widely recognized brand or product name in the context of beverages or mixology.

If this is a custom recipe or a niche product, here’s a breakdown of what it might entail:

King Crest Watermelon Lemonade Ice Salt (30ml)

• Watermelon: Likely used as a juice or puree for a sweet, refreshing base.

• Lemonade: Adds a tangy, citrusy flavor to balance the sweetness of the watermelon.

• Ice: Used to chill the drink and dilute it slightly for a refreshing texture.

• Salt: A pinch of salt can enhance the flavors and balance the sweetness and acidity.

Possible Preparation:

1. Blend fresh watermelon to extract the juice.

2. Mix with lemonade (store-bought or homemade).

3. Add a pinch of salt and stir well.

4. Serve over ice in a 30ml shot or small serving size.