Tough, but incredibly thin and light – GSI Outdoors Microlite 1000 Twist keeps a liter of cold stuff cold for 32 hours, and hot stuff stays hot for 18. That’s a long time. Perfect for hydrating on hot days, its advanced engineering goes beyond insulation. The walls are impossibly thin – just 2mm – so we’ve shed a bunch of weight and streamlined the profile without sacrificing durable performance. The 18/8 stainless steel is tough and pure, and the secure twist-top is engineered for easy opening – even if it’s frozen shut and you’re wearing gloves.
Microlite Vacuum Technology – outstanding performance that’s 1/3rd lighter than traditional designs
Long-lasting double-wall insulation delivers 18-hour heat and 32-hour cold retention
18/8 stainless steel for outstanding purity and durability
GSI engineered 2mm walls minimize the footprint without sacrificing durability or performance
Secure twist cap with leverage lobe prevents leaks, is easy to open with gloves on
Integrated leash on lid provides easy attachment point
1000ml (33.8 oz) size – our largest – is great for long hikes, backpacking and daily use