GSI Outdoors Microlite 1000 Twist Insulated Bottle

Incredibly lightweight, vacuum-insulated bottle provides 15 hrs. heat and 27 hrs. cold retention while being 1/3rd lighter than traditional designs. Impossibly thin walls are actually thinner than most single wall plastic bottles for an amazingly compact footprint that fits anywhere. 18/8 stainless steel boasts unrivaled purity and durability. Secure, screw top cap includes leverage enhancing lobe which makes opening frozen bottles easy- even with mittens or gloves. Leash provides convenient attachment point.