Volume graduations to 150 mLA reinforced base that wont wobble on the counter preventing spillsA new easy-to-open latch that can be manipulated with one handGreater clarity for improved visibility of contentsReagent reservoirs are reusable -- an environmentally sound alternative to disposable reagent reservoirs. Their extra-large capacity means fewer refills and time saved. The V-shaped basin is compatible with both eight- and twelve-place multiple pipettors with minimal reagent waste. Lids are removable -- attached with ball and socket hinges -- and latch tightly for secure storage of left-over reagents.With lids closed reagent reservoirs are stackable. A perimeter ridge on the lid prevents sliding. Construction is clear chemical-resistant autoclavable polypropylene. Molded graduation marks provide volume indication at 25 50 75 100 125 and 150 mL