Coolflask 64oz Half-Gallon Insulated Stainless Steel Water Bottle with 3 Lids

The Coolflask 64oz is a half-gallon insulated stainless steel water bottle with triple insulation (double-wall vacuum seal) delivering 48 hours cold retention and 24 hours hot retention. It ships with three interchangeable lids: a screw-on flip-handle for refilling, a spout lid for hot drinks, and a straw lid for cold sipping. Built from 18/8 (304) stainless steel, it's BPA-free, rust-proof, and features an anti-sweat coating to reduce condensation. At 64oz (half gallon), it's positioned for all-day hydration, gym, hiking, and office use. The bottle is hand-wash only and not dishwasher-safe. Coolflask is a lesser-known brand with modest market presence, and the large capacity makes it less suited to everyday cup-holder carry than the 24–32oz category leaders.