1.Food-Grade BPA FREE plastic
2.100% leak-proof
3.Easy to clean and safe for microwave, freezer, dishwasher

4.Engraved scale in oz and ml

5.Easy to drink from 
6.Includes an ball/sieve/mesh inside the bottle
7.We are a factory/manufacturer and can control the quality well.

8.Can send a sample to you before making the larger purchase.
So you can rest assured of their safty and quality.