The tube has a media plug impregnated with dehydrated media positioned within {TAIL ~ the tube} near {HEAD ~ the top} of a region of restricted diameter, and a compartment of rehydrating fluid located in a cap on the tube 
The tube has a media plug impregnated with dehydrated media positioned within { TAIL ~ the tube } near { HEAD ~ the top } of a region of restricted diameter , and a compartment of rehydrating fluid located in a cap on the tube
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH