Description 1. If you received broken items, please contact us for full refund or replacement. Thank you 2. We have the glass flask of 50ml~1000ml. 3. SILICONE STOPPERS INCLUDED: This set has one silicone stoppers for each Erlenmeyer Flask, which is sterile and can very very perfectly seal the liquid or powder in the flask for experiment and storage. 4. ACCURATE SCALES: have clear and accurate scales for you to measure liquid efficiently,The white marker area allows you to use a ballpoint pen to write down information about the items you store 5. ADVANTAGE: Portable bottle.Reusable, tightly sealed,environmental friendly, will not shatter easily, easy to clean, high temperature resistance,easy to carry, for laboratory, chemistry, science experiment, liquid measuring, picnic cumin/paprika/salt bottle,etc.