Tested in Norway and Antarctica by some of our professional customers, this Gemstone Thermo Flask from Sigg is a super light weight option.
Works as a stand alone for Norwegian winters, or in combination with a heavier flask for Antarctica.
What Sigg say:
Hiking, mountain biking, canoeing... No matter what, our double-walled stainless steel thermo bottle from the Gemstone collection will be your reliable companion. It keeps your drink hot or cold for hours due to it's vacuum insulation. The cap can also be used as a cup, which makes drinking even easier. The 1-liter Obsidian bottle is as resistant and durable as stone and timeless like a gem.
DOUBLE-WALLED 18/8 STAINLESS STEEL
Like all other SIGG vacuum products, the bottles of the Gemstone collection are double-walled with both inside and outside bodies as well as a vacuum space between them. Gemstone products are copper coated on the inside. This guarantees insulation that is among the best you can get in an insulated bottle.
30% LIGHTER THAN STANDARD BOTTLES
The flasks and food jars have an ultra-thin inside body which is made using a special spinning technology which is why it weighs 30% less. Thanks to high-precision welding, the vacuum gap inside the bottle has been reduced to a minimum. This results in a smaller bottle size compared to standard bottles with identical content