Polypropylene multichannel reagent reservoirs – available in 10, 25 and 100 ml sizes – offer all the advantages of their polystyrene counterparts. The disposable reservoir fits securely within a sturdy reusable base, and features clearly visible integrated volume graduations for ease of use, allowing rapid, accurate filling. The low dead volume, deep trough offers maximum fluid recovery, with pour-back spouts molded into the corners of each reagent reservoir to enable convenient, spill-free return of unused reagent to the source container. The reservoirs can also act as lids, preventing evaporation and spillage. A space-saving, stackable design significantly reduces storage requirements, and there is less material waste than with other commercially available regular polypropylene reservoirs.