Bison 2.5L Thermo Flask

When you need serious volume and all-day performance, the Bison 2.5L Thermo Flask steps up. Built from rugged stainless steel with premium vacuum insulation, this flask is perfect for long training sessions, range days, hunts, road trips, and hot South African summers. Big capacity, big handle, big durability — no fuss, just dependable performance.

Key Features

- Massive 2.5L Capacity — less refilling, more adventuring.

- BPA-Free — clean, safe, and taste-neutral.

- 18/8 Stainless Steel Construction — tough, rust-resistant, and built to last.

- Double-Wall Vacuum Insulation — exceptional hot and cold retention.

- Keeps water HOT for up to 24 hours — coffee stays piping, soup stays comforting.

- Keeps water COLD for up to 36 hours — ideal for hot range days.

- Keeps ICE frozen for up to 24 hours — maximum chill all day.

- Keeps warm water warm for 24 hours — consistent performance in any conditions.

- Large Ergonomic Carry Handle — easy to grab and transport, even when full.

Why We Like It

The Bison 2.5L Thermo Flask is built for people who don't mess around with hydration. It’s a rugged, oversized workhorse that maintains temperature better than many big-brand flasks, and the handle makes carrying a full 2.5L surprisingly comfortable. If you want durability, reliability, and long-lasting temperature control, this one delivers every time.