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Simple to use - Combining the CamelBak Big Bite Valve with a stem tube and shut-off valveEasy for small fingers to operateChild-safe - Simplified stem and straw are safe and easy to use and to remove for cleaningAll parts are dishwasher safe (top rack)Tritan - Stain-resistant, taste-free and 100% Free of BPA, BPS and BPFNot for children under 3 years