Snow Peak Ti-Double H300 Stacking MugSnow Peak's titanium stacking double walled insulated mugs come in a variety of sizes and nest together to take up minimal space. Please note: Double wall titanium cannot be placed over an open flame. As shown you can pair the H300 Titanium Double Wall Stacking Mug with the Titanium Double Wall H200 Stacking Mug or the Titanium Double Wall H450 Stacking Mug, and nest them together for easy storage at home or outdoors. *Please note, to preserve the