We're working out what we think - we'll add our view here!
Snow Peak says:
Our smallest double wall mug is great for holding a double shot of espresso or a short morning brew to start your day. Its Titanium properties will keep your drinks warm and is rugged enough to withstand any adventure. Foldable handles ensure this mug takes up minimum space in your pack.
Double-wall titanium should not be used for cooking or placed over a heat source.
*Please note – to preserve the printed logo on your mug we recommend you wash the item by hand, dishwashing may cause the printing to loose adhesion and come away from your mug.