Dispensing closures come in a variety of styles.  Flip Spout Caps are one of the oldest designs.  This closure has a spout that flips up from an indentation in the cap and then fits back in the same indentation when not in use.  This type of closure will work with thinner types of liquids and more viscous materials.  It is important to select the appropriate opening/orifice in the spout  The Yorker Spout is a unique inverted cone shape with an orifice for dispensing from a squeeze bottle.  These come with a red tip to protect the opening.  You will often find these used for mustard, ketchup, paint, glues and many other higher viscosity products.