Thermos - Charcoal Ultimate Flask (900ml), Reusable Insulated Stainless Steel Thermal Coffee Cup for Hot or Cold Drinks, Vacuum Sealed Water Flask with a Leak-Proof Lid, 24hr Hot/24hr Cold

Genuinely keeps coffee hot for up to 24 hours! As per other reviewers, mildly annoying that there is an instruction leaflet inside the flask but unscrew the grey cap insert and it's easy to put your finger in and winkle it out! Forget all the other johnny-come-lately flask companies (many of which I have tried) Thermos is clearly the best.

The Thermos Ultiimate drinks flask unique feature is in its ability to keep drinks scalding hot for 18 hours and hot for 24 hours. I purchased 2 of the smaller size (previous model) one for me and one for my wife about 15 or more years ago and they have never failed to impress on how hot they kept our tea or coffee. They are quite tough and resilient . Unfortunately I dropped mine once too many times , but without blinking instinctively reordered a new one within a heartbeat. Ooops, my eagerness caused me to order the larger 900ml size in error. I will keep it for hot water when we do go out together, as I drink coffee and she drinks Tea. I have already ordered the smaller size ( currently available from TK Max at under £20 and ordered on line for collection tomorrow I can’t wait). Originally I used it for work knowing wherever I was driving to around the country I had a hot coffee to enjoy and even if half drunk a very warm coffee at the end of the day before I started to drive home. I found the smaller size quite adequate to last me throughout the day providing 2 cups of coffee throughout the day. Life without one is almost inconceivable, that is how impressive the Thermos Ultimate flask is. I will keep the larger 900ml size and not return it as even though it is too large for my regular use as I’m sure it will come in useful on the odd but critical situation e.g. Overnight keeping water hot for the morning on a Trip or if I’m in bed unwell a hot drink to hand all day or overnight. It will also be great for cold drinks if going on a picnic or to the seaside with family . It may seem expensive but it truly is a long term investment. 20 out of 10.

I recently purchased the Thermos Ultimate Series Flask in Charcoal, 900 ml, and it has exceeded my expectations in every way. Here’s why it deserves a full 5-star rating: Pros: Exceptional Insulation: This flask keeps my drinks hot for an impressively long time and cold for way longer than 24 hours. Whether I'm out hiking, camping, or just on a long road trip, my beverages stay at the perfect temperature throughout the day and beyond. Durable Build: The build quality is impressive. Made with high-quality stainless steel, it’s robust and can withstand the rigors of outdoor adventures. The charcoal color also gives it a sleek, stylish look. Leak-Proof: The flask is completely leak-proof. I’ve carried it in my backpack, and not a single drop has spilled, which is a huge plus for me. Easy to Use: The lid doubles as a cup, which is very convenient. The pouring mechanism works smoothly, and the wide mouth makes it easy to fill and clean. Perfect Size: At 900 ml, it’s the ideal size for carrying a substantial amount of beverage without being too bulky. It fits well in my backpack and is great for both solo adventures and sharing with a friend.y. It fits well in my backpack and is great for both solo adventures and sharing with a friend. Cons: Weight: Given its solid build and capacity, it’s a bit heavier than some other flasks. However, this is a minor trade-off for the durability and insulation performance it offers. Overall: The Thermos Ultimate Series Flask, Charcoal, 900 ml, is a top-notch product that lives up to its name. It provides outstanding insulation, durability, and convenience, making it an essential item for anyone who enjoys outdoor activities or needs reliable temperature control for their drinks. Despite being slightly heavier, its performance more than makes up for it.

I have previously owned Stanley Flasks and, despite their shortcomings, I continued to purchase them. However, I now recognize that this particular product, which I have used in the past, offers superior performance. Thermos products are known for their excellent heat retention and overall quality, consistently outperforming other brands. This item comes with a two-year guarantee, and based on my experience as a plant driver, I anticipate it will last significantly longer, even with regular use on a construction site. While its capacity is less than one liter, it is perfectly adequate for my daily tea consumption.

Gets excellent reviews. Update: bought replacement and heat retention is truly amazing, just tested after 18 hours and water v hot, even without pre heating. Now have 2, using the other for soup and meals that can be easily get in and out. Ideal for long trips to a destination, as everything's stays really hot. Original review: Bought used in 'mint' condition. Unfortunately it was delivered severely dented, so return in progress. This seems to highlight it is made of lightweight metal and may explain why it has silicone bumpers. So lightness exchanged for being physically less robust and easily damaged! Looks like it was packed poorly and or not handled well, maybe considered a 'fragile' item

Used this flask for the first time today whilst out fell walking. Filled full with tea/milk at around 7am contents still hot when opened around 12pm for lunch stop, then again still hot at 3pm when I got back to my car for a drink. Very impressed no leaks in my rucksack and perfect size/lightweight keeps everything insulated and hot👍

Brilliant, we tested the flask for over six hours and the water was still boiling. No issue getting the paper out, just unscrew the inner cap. Highly recommended

Love it, just the right size, keeps my coffee hot and looks stylish. Looks adventurous, feels good to the touch.