Travel flasks are, of course, made with convenience and portability in mind, so in terms of size, they aren’t meant to be too cumbersome. With volumes generally ranging from 350mL-480mL, a good travel flask will hold a generous amount of your favourite hot or cold beverage.
Insulation is also a big factor in deciding what flask is best for you. Do you need something that will keep your drink warm just throughout the morning? Or does it need to last the distance and take you through your busy day. Travel flasks are designed with the purpose of retaining the ideal temperature of your beverage, so most of them will be designed with vacuum insulation and double walls; however stainless steel does seem to be the best insulator.
If you’re a dedicated tea drinker, you may want to consider whether your travel flask needs to be capable of brewing loose leaf tea on-the go. Some flasks will come with different and ingenious ways of steeping your favourite leaves with plungers or baskets seeming to be the standard methods for most flasks.
- Plastic –
- Nearly all plastic foodware/drinkware these days are made from BPA free plastics so no unwanted toxins will seep into your food or drink
- Plastic is durable but can still crack if dropped from a height or at an unfortunate angle
- Transparent plastic flasks may start to appear cloudy after awhile
- Stainless steel –
- Excellent heat retention
- Very durable
- Modern good looks
- More susceptible to breakage
- Good looking
- Sometimes heavier than other flasks made from other materials
- More susceptible to breakage and chips
- Less about portability and more about looks and insulation