Most ostomy pouch suppliers include waste bags.  We wanted a simple way to stuff a few waste bags into our kits for travel.   These dog waste pouches seem to do the trick.  We simply remove the included waste bags and stuff the ostomy waste bags in the holder.  This holder can be carried inside or attached to the outside of your ostomy kit with the included carabiner hook.  We were able to get a small number of these, in four colors, at a great price.  Available until they are gone.
 
Simple Design
Carry and easily access ostomy waste bags
Integral Emergency LED flashlight
Available in 4 Colors (Teal, Green, Grey, and Pink)