Slide Creams and Lubricants help to keep a Trombone in good playing condition by providing a barrier against friction within the moving parts of the trombone slide. Trombonists have the option of using a cream liquid lubricant. It has been my experience that most younger students have an easier time with a liquid lubricant such as Slide-O-Mix. A small spray bottle similar to one that can be found for $1 in most travel sections of the drug store is necessary as the water from the spray helps to "activate" the lubricant and keep it working until the next application.
Recommended Lubricants: Slide-O-Mix Rapid Comfort (black tipped bottle, similar to the orginal formula, expect only one bottle, more managable for younger students), Superslick, Trombotine.