I looked at both products and was impressed. It looks like the Tatonka 18/8 Stainless Steel Bottles are sold in the UK. If so, a high cost in shipping to the U.S. There are several U.S. manufactures of stainless steel water bottles (the US Canteen as one of them) on the market like Thermos, Thinksport and Camelbak, and all are insulated, a plus for camping, hiking, etc.

Be aware of Sigg, they have lost their credibility with the deception of their BPA lining in the aluminum bottles, linking to health issues and ban consideration in a few states.