25 ml divided reservoirs are comprised of 5 and 10 ml compartments, while still nesting comfortably in the standard 25 ml reusable, sturdy base. Each reservoir features the SureFlo™ anti-sealing array and hydrophilic surface treatment providing especially low dead volumes. This is particularly helpful when pipetting precious samples or expensive reagents with a multichannel pipette. Inserts are available in polystyrene or polypropylene for improved chemical compatibility.