Transparent polysulfone body with linerless polypropylene caps. Guaranteed leakproof. Graduations at both 90 and 99 ml and guaranteed accurate to ±1 ml. Allow 1/10 or 1/100 dilutions in same bottle. These transparent bottles are appropriate for most aqueous and many organic compounds, and withstand temperatures from -100°C to +165°C. Closures withstand from 0°C to 135°C. Materials are non-toxic and safe for food. Autoclavable.