harmonica

Most bullet mics are between 2-1/4" and 2-1/2" in diameter (the round holes in harp cases are 2-1/2"). Many of the cups and glasses in your house are this diameter, including standard 16oz water bottles. If you're new to playing a bullet mic, time spent with it in your hands is needed to gain a comfort level. You can of course play with the mic plugged into your amp, or unplugged (with cable disconnected if it's detachable) or even a household cup to create a mic analog. Either way, you're getting used to having that bullet shape be part of your harmonica hold.

Here's a simplistic, but effective way to incorporate your hands while playing. Go to http://www.bluesharmonica.com/lessons/solo_harmonica_study_2 and study Ex. 1.5. While playing single notes, open your hands. When playing chords, close your hands (cupped). Playing this way emphasizes the melody (louder and brighter in tone) and de-emphasizes the chording (softer and more muted/bassy). This accentuates the impression that two harmonica players are playing.