Simple to use - Combining the CamelBak Big Bite Valve with a stem tube and shut-off valve Easy for small fingers to operate Child-safe - Simplified stem and straw are safe and easy to use and to remove for cleaning All parts are dishwasher safe (top rack) Tritan - Stain-resistant, taste-free and 100% Free of BPA, BPS and BPF Not for children under 3 years