--- product_id: 37612139 title: "Charcoal Ultimate Flask (500ml), 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" brand: "thermos" price: "¥19109" currency: JPY in_stock: true reviews_count: 6 category: "Thermos" url: https://www.desertcart.jp/products/37612139-charcoal-ultimate-flask-500ml-reusable-insulated-stainless-steel-thermal-coffee store_origin: JP region: Japan --- # 24hr hot retention 24hr cold retention durable stainless steel Charcoal Ultimate Flask (500ml), 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 **Brand:** thermos **Price:** ¥19109 **Availability:** ✅ In Stock ## Summary > 🔥 Sip in Style, Stay Hot or Cold All Day ❄️ ## Quick Answers - **What is this?** Charcoal Ultimate Flask (500ml), 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 by thermos - **How much does it cost?** ¥19109 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/37612139-charcoal-ultimate-flask-500ml-reusable-insulated-stainless-steel-thermal-coffee) ## Best For - thermos enthusiasts ## Why This Product - Trusted thermos brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Rugged Yet Refined:** Stainless steel body with protective silicone rings means it’s built to survive your busiest days and wildest adventures. - • **Comfort Grip, No Sweat:** Double-wall insulation keeps the exterior cool and condensation-free, so you stay comfortable and stylish on the go. - • **Adventure-Ready Capacity:** 500ml of pure hydration power in a lightweight, leak-proof flask that’s your perfect companion from boardroom to backcountry. - • **Smart Spill-Proof Design:** Two-part stopper and wide mouth combine for smooth pouring and easy cleaning—because convenience is key. - • **All-Day Temperature Mastery:** Keeps your coffee piping hot or your iced brew refreshingly cold for a full 24 hours—no compromises. ## Overview The Thermos Charcoal Ultimate Flask (500ml) features advanced vacuum insulation technology that maintains beverage temperature for 24 hours hot or cold. Crafted from durable stainless steel with protective silicone rings, it offers a leak-proof, spill-resistant design with a two-part stopper and wide mouth for easy use and cleaning. Lightweight and rugged, it’s ideal for professionals and outdoor enthusiasts seeking reliable hydration with a sleek, modern edge. ## Description Product Description Ultimate MKII 500 ml flask with ultimate insulation for maximum temperature retention, hot or cold, keeping hot or cold for 24 hours. Cool to the touch with hot liquids, sweat-proof with cold and with protective silicone rings for ultimate durability. Two part stopper to smooth the flow of liquid. Set Contains: 1 x Thermos Ultimate flask Review: It retains temperature longer than any other brands - I like its capacity of retaining drinkable temperature for far longer that many flasks I have tried over the years. It is costlier than the others but worth the money. One thing I do not like about it is its constricted opening. Even a teabag once gets inside, it is hard to take it out. We could not even take out the very small 2-page instruction manual after we opened the box. Only after soaking it with hot water were we able to free it out but not in one piece. I still give it a 5-star rating because of its unparalleled capacity of retaining the heat as well as the flavor of my Darjeeling tea. Review: Great hiking companion - This little lightweight thermos provided a timely hot coffee on the trail as I recently hiked the Tasmanian highlands. Recommended. ## Features - Temperature Control - Advanced vacuum insulation maintains drinks steaming hot or refreshingly cold for 24 hours, letting you enjoy your beverage at the ideal temperature all day long - Rugged Design - Robust stainless steel construction with protective silicone rings withstands drops, bumps, and outdoor adventures while preventing dents and scratches - Comfort Grip - Double-wall insulation ensures the exterior stays cool with hot drinks and condensation-free with cold beverages, providing comfortable handling in any weather - Smart Pour System - Two-part stopper design controls liquid flow and prevents spills, while the wide mouth opening makes filling and cleaning quick and simple - Outdoor Ready - 500ml capacity holds enough liquid for extended adventures, while the lightweight yet durable construction makes it ideal for hiking and camping trips ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B013YMS8QS | | Additional Features | BPA Free, Cold 24 Hours, Durable Stainless Steel, Hot 24 Hours, Leakproof, Vacuum Insulated | | Age Range (Description) | Adult | | Age Range Description | Adult | | Base Diameter | 7.2 centimeters | | Best Sellers Rank | #508,769 in Kitchen & Dining ( See Top 100 in Kitchen & Dining ) #3,613 in Insulated Bottles | | Brand | THERMOS | | Brand Name | THERMOS | | Cap Type | Screw Cap | | Capacity | 500 microliters | | Color | Charcoal | | Customer Reviews | 4.7 out of 5 stars 1,256 Reviews | | Global Trade Identification Number | 05010576041050 | | Included Components | Lid Cup, Pouring Spout, Protective Silicone Rings, Stainless Steel Bottle, Two Part Stopper | | Item Dimensions W x H | 2.83"W x 9.29"H | | Item Type Name | Ultimate MKII Series Flask 500ml | | Manufacturer | Thermos | | Material Type | Stainless Steel | | Model Name | Ultimate | | Number of Items | 1 | | Pattern | Solid | | Product Care Instructions | Hand Wash Only | | Recommended Uses For Product | Water | | Special Feature | BPA Free, Cold 24 Hours, Durable Stainless Steel, Hot 24 Hours, Leakproof, Vacuum Insulated | | Theme | Solid | | Unit Count | 1 Count | ## Product Details - **Brand:** THERMOS - **Capacity:** 500 microliters - **Color:** Charcoal - **Recommended Uses For Product:** Water - **Special Feature:** BPA Free, Cold 24 Hours, Durable Stainless Steel, Hot 24 Hours, Leakproof, Vacuum Insulated ## Images ![Charcoal Ultimate Flask (500ml), 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 - Image 1](https://m.media-amazon.com/images/I/61c1qAnPpmL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ It retains temperature longer than any other brands *by I***U on March 24, 2021* I like its capacity of retaining drinkable temperature for far longer that many flasks I have tried over the years. It is costlier than the others but worth the money. One thing I do not like about it is its constricted opening. Even a teabag once gets inside, it is hard to take it out. We could not even take out the very small 2-page instruction manual after we opened the box. Only after soaking it with hot water were we able to free it out but not in one piece. I still give it a 5-star rating because of its unparalleled capacity of retaining the heat as well as the flavor of my Darjeeling tea. ### ⭐⭐⭐⭐⭐ Great hiking companion *by I***A on May 31, 2021* This little lightweight thermos provided a timely hot coffee on the trail as I recently hiked the Tasmanian highlands. Recommended. ### ⭐⭐⭐⭐⭐ Très efficace 22 hrs au congelo *by E***E on February 15, 2026* Ça fait quelques Thermos que j’achète pour mes expéditions hivernales. Mais celui-ci c’est le plus performant de tous. J’ai fais un test au congélateur (-18) avec de l’eau bouillante à l’intérieur et je l’ai oublié dedans pendant 22 hrs. Le matin j’étais curieux et l’eau étais encore chaude. Je recommande. ## Frequently Bought Together - Thermos Ultimate MKII Series Flask 500ml, Grey - Thermos FFX900 Ultimate MKII Series Flask 900ml, 900 ml, Grey --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.jp/products/37612139-charcoal-ultimate-flask-500ml-reusable-insulated-stainless-steel-thermal-coffee](https://www.desertcart.jp/products/37612139-charcoal-ultimate-flask-500ml-reusable-insulated-stainless-steel-thermal-coffee) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-10-02*