Thermal Flasks & Insulated Bottles

Thermal flasks keep their contents hot or cold for longer, whether you need piping hot tea for a frosty morning when camping or icy cold water to quench your thirst on a weekend hike. With insulating layers that create a barrier to minimise heat transfer, the liquid inside retains its temperature, regardless of the external conditions. Necessary for keeping hydrated during any outdoor adventure, choose from trusted brands like Stanley for a reliable flask you’ll use again and again.

Thermal flasks from Outdoor Action

Made with durable materials to withstand frequent outdoor use, find reliable thermal flasks in our selection at Great Outdoors. Choose your preferred size with easy-to-carry 300ml flasks for short hikes and up to 1.9-litre bottles for longer adventures. In compact shapes that fit seamlessly into backpacks or side pockets, their portability makes them an excellent choice for on-the-go hydration to ensure you stay fueled and hydrated during your adventure.

How does a thermal flask work?

A thermal bottle is designed with two layers of materials, usually, stainless steel, and the space between the walls is vacuum. This double-walled construction with the vacuum creates a barrier to prevent heat from moving between the inner and outer walls of the flask, slowing down any heating or cooling of the contents.