Add a header to begin generating the table of contents

    Portable, reusable coffee cups are a brilliant idea to help you take your hot drinks on the go, but sometimes you need to take enough to fuel a few people, or so you have a supply throughout the day.

    In this case, only an insulated thermal bottle or flask will do. You can fill it up, and the coffee will stay warm for hours so you can enjoy that hike or the full day at your desk.

    Many will also accommodate cold drinks, so can be used for iced coffees and cold brews too (or for the rare occasion when you are taking a non-coffee drink with you).

    These are our top picks of the best coffee flasks, thermoses and insulated bottles.

    Our Top Picks

    The Best Thermal Coffee Flasks

    Hot Drink Flask Buying Guide

    Thermal Time

    When you are looking for a flask which can keep your hot drinks in perfect condition, you will probably be concerned with how long they can do this for.

    Some people will need to keep theirs warm for just a few hours, whereas others may need something which will work overnight on a camping trip. The thermal time can range anywhere from around four hours up until 24 hours.

    It is worth bearing in mind that how hot the drink is in the first place could affect this time, as could how long the lid is left off. The addition of cold milk can also bring the temperature down a few degrees.

    Many thermal flasks can also keep cold drinks cool. This will usually be for a lot longer than they can keep hot drinks warm, which is understandable but can also be worth looking at if you will be making your flask multi-use.

    If you are a full hot coffee aficionado, you may even want to keep the milk in a separate cold bottle.


    This can range from around 300ml to almost two litres for these flasks. Which size you will need will depend on how many servings you will be making.

    A cup can usually hold between 220ml and 340ml of liquid. Check how big your travel cups are if you’re using some, and work out how many cups you will need out of the flask.


    This is a guide on the overall dimensions of the flask. You may be restricted over where the bottle can fit, such as in a bag, or simply don’t want to carry a huge flask around all day.

    Pour Spout

    There are various options here. You can remove the entire lid and pour from the jug or bottle as normal which is good if you will be pouring into a mug. You can press down on openings to have a more restricted flow which may be better for controlled pouring or drinking straight from the flask.

    Remember that larger spouts could be easier to get the water and coffee into the flask, but can be less controlled to get it back out again, so it is all about finding the balance which is right for you.


    This is down to personal preference. You can opt for the traditional screw-top stainless steel bottle or something a bit more bulky with handles, extra cups and which is easier to carry. Many offer a choice of colours or designs.

    How We Have Picked Our Best Thermal Flasks

    First of all, we looked for a capacity of at least 500ml. This gives you two cups of coffee on average, or enough to sip at for a few hours until it starts to do cold. There are a few on our list which holds less than this, but depending on your circumstances this may be all you need.

    We looked at the time for which the hot drinks can stay warm, aiming for a range between six and 24 hours so everyone is happy. We also wanted products which are easy to carry and transport, hold when pouring, and which won’t leak in your bag nor pick up condensation.


    Are Coffee Flasks Easy To Clean?

    Usually, no. Which is a given with their design really. This makes it important for you to know how to clean them before their first use.

    You can’t stick your hand in them and it would be difficult to get a washing-up sponge inside, but you have to try and clean them ASAP so the coffee doesn’t stain and the taste doesn’t stick around.

    You can now buy bottle brushes which will get right into the bottleneck and down to the bottom. If cleaning is not something which you are keen on, you may wish to opt for a larger flask with a wide neck which is easier to get into.

    You can get the smell out of a bottle by using some vinegar and hot water and allowing it to steep before air drying. Bleach should never be used, and flasks should always be dried fully after use to stop the growth of mould.

    Do I Need A Handle?

    Many of the larger flasks come with handles. This makes it easier for you to pour from them, especially if you have smaller hands. It isn’t necessary, and indeed a handle could take up valuable carrying space, but do remember you will be working with hot drinks so safety is key.

    What Is The Optimum Temperature For Flask Coffee?

    Around 80°C is said to be best for serving coffee, but some experts say that something more around 40°C to 50°C is optimum to ensure the coffee does not burn and the taste isn’t damaged.

    For this reason, the majority of flasks will be able to hold your hot drinks at around 60°C. You also don’t want it being too hot in case you have a spillage when pouring, or it leaks.


    Share on facebook
    Share on google
    Share on twitter
    Share on linkedin
    Share on pinterest
    Share on print
    Share on email

    Our Philosophy is simple: “Love Coffee at Home.”

    We want everyone to be able to enjoy really tasty coffee in the comfort of their own home. It’s easy, and shouldn’t be exclusive to a coffee shop.

    We may receive a small commission on purchases made from the links on this page. This does not affect the quality of our recommendations or their prices. But it does help support our team’s hard work, which is something we are always grateful for.

    Copyright © 2017 – 2021 Daily Espresso

    Contact Us

    Copyright © 2017 – 2021 Daily Espresso