Expo Marker Case (Slim)

I needed a case for my slim expo markers so they wouldn't be so loose in my bag. This is a very minimalist case that has a couple features:

1. Holds 4 slim Expo Markers
2. Lid is easy to put on and take off, but won't fall off
3. When the lid is off the markers can be in two states
   1. Markers are snugly pushed in and won't fall out
   2. Markers are resting and will fall out easily (this allows for quick and easy swapping)

May create a second version that has a magnetic eraser built in.