Thinksport bottle construction:
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?
750ml (25oz): 10" high x 3" wide
350ml (12oz): 8" 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 over four years ago with excellent results.

How do I care for my Thinksport bottle?
While we recommend hand washing our bottles, they are dishwasher safe. We would recommend lodging the strap so that it doesn't get caught by the rotor.
Please note that we do not use Lead in our paint. While you might think that this is obvious, the test for Lead in Europe and the US allows for low levels of Lead. The type of test also measures what is coming off the bottle in a solution, which could easily be nothing. We test the paint in its wet state, which produces test numbers that are accurate depictions of what is in the paint. Do not use any abrasives on the outer surface.

Since 2006, Thinkbaby & Thinksport has been creating safe, highly functional, and sustainable products. We continue the safer products mission by targeting harmful consumer product categories and developing safer alternatives for a wide audience ranging from babies to athletes. With a team of physicians & scientists, Thinkbaby & Thinksport lead in the usage of safe materials for consumer products. As such, the company has a long list of FIRSTS 1^st  BPA free baby bottle line, 1^st  BPA free insulated sports bottle, 1^st  line of yoga mats free of harmful chemicals, and the 1^st  sunscreen to pass Whole Foods Premium Care requirements.