All your questions are addressed on their website….www.thecoldestwater.com We have several containers from them as well as cold packs. All are well made and do what they advertise. In comparison to other products such as yetti products, this company is putting out a quality product for about half of the cost of others such as yetti.
On it’s product description page on Amazon it is stated that the bottle is BPA free. It also states that ” to keep our liquids the COLDEST. We use real, true-stainless steel, vacuum insulated, powder coated,…” For the other questions I suggest you make direct contact with the company.