Our sturdy disposable reagent reservoirs have been redesigned with trimmed base corners, deeper pour-off spouts for spill-free emptying, and a deeper, narrower "trough within a trough" to maximize reagent recovery. Easy to read side wall increments help minimize reagent waste with more accurate filling. Sterile reservoirs are sterilized by gamma irradiation during manufacture and are individually wrapped for convenient single unit use. An optional lid is available for 100 microliter reservoirs to minimize evaporation and eliminate dust or other contaminates during use.