The bottles are double-walled stainless steel. The mouthpiece is made from polypropylene. We would not advise drinking directly from a metal top. The collar of the bottles and the screw -on cap are encased in stainless steel.
There is an internal silicone washer. There is no liner inside the bottle or chemical coatings. The bottles are tested for chemicals like BPA, phthalates, heavy metals and biologically harmful chemicals.
What type of stainless steel do you use?
Our bottles are made of 18/8 medical-grade 304 stainless steel and do not have any type of liner.
What are the dimensions of your bottles?
500ml (17oz): 9.5" high x 2.5" wide
Where are your bottles manufactured?
Our sports bottles are made in China. To proactively address any potential concerns, we'll mention that all of our products adhere to our strict chemical policy. The Thinksport bottles have been and continue to be tested globally to ensure their safety. In fact, our bottles undergo rigorous chemical and biologic testing from multiple laboratories to ensure that they do not contain or leach toxic chemicals. Furthermore, Whole Foods has audited our facilities for compliance with Good Manufacturing processes. Regarding quality, the Thinksport bottle has been thoroughly field-tested since our inception with excellent results.