Narrow-Mouth Bottle, (polycarbonate) PC bottle, PP screw closure Autoclavable, window-clear bottles with excellent impact resistance. Nalgene offers the widest selection of clear polycarbonate bottles from 500 ml to 20 liters. The 500- and 1000-ml sizes (Cat. Nos. 2205-0016 and 2205-0032) are good for smaller volume applications where you need to see your contents. The 2- and 2.5- liter sizes (Cat. Nos. DS2205-0210 and DS2205-0250) can be used as culture vessels for batch, suspension or non-attached roller-culturing. The 4- and 8-liter sizes (Cat. Nos. DS2205-0010 and DS2205-0020) have built-in shoulder loop for attaching an identification tag. Transparent/Leakproof†/Autoclavable . NOTE: Before autoclaving, just set cap or closure on top of the container without engaging the threads.