Merchandise concept: Physical clear board summoners rift map.

A high resolution Summoners rift map printed onto a small board of handheld, or tabletop size with clear material (probably glass) covering the top to allow for the ability to cleanly draw on it the same way as a whiteboard.

Optional additions:

Markings on the map indicating exact positions of jungle camps and epic monsters as well and red and blue side.

Additional information such as the exact timers of things like jungle timers indication initial spawn as well as their respawn times. This could be information mixed into the jungle camps and potential symbols for them or could be printed out in a seperate index on the board or even in an information sheet that comes with the board.

Additional pieces that are small magnets that have champions splashes printed onto them and could stick to the board if the base piece of it was made of thin, light metal

Finally the rough sizes could be anywhere from 20in by 20in for small, and even a full sized whiteboard size for large.

An additional thought is that it might even be possible to create a program that would fulfill the same purpose, allowing users to look around summoners rift in spectator fashion and use the ability to draw in the same manner as the board. Not sure if professional teams would find this sort of program useful but I think that it's worth a try.