{"product_id":"the-arctic-vessel-thermos-stainless-steel","title":"The Arctic Vessel | Double-Wall Stainless Steel Thermos (500\/1000\/1500ml)","description":"\u003cdiv class=\"product-narrative\"\u003e\n\u003cp\u003e\u003cstrong\u003eTemperature Is Not a Preference. It Is a Promise.\u003c\/strong\u003e A thermos that cannot hold heat for a full workday is not a thermos -- it is a cup with a lid. The Arctic Vessel series uses double-wall vacuum insulation with a copper lining to achieve 12-hour hot retention and 24-hour cold retention, from the first sip at dawn to the last swallow on the evening commute.\u003c\/p\u003e\n\u003cp\u003eAvailable in three capacities -- 500ml, 1000ml, and 890ml -- each bottle is constructed from 18\/8 S stainless steel with a powder-coated exterior that resists scratches and prevents condensation. The wide mouth accommodates ice cubes for cold drinks and makes cleaning straightforward. A BPA-free sport cap provides one-handed drinking, while the vacuum-insulated wall ensures no external condensation regardless of beverage temperature or ambient humidity.\u003c\/p\u003e\n\u003cp\u003eThe internal copper lining reflects thermal radiation back into the liquid, reducing heat loss through the wall by approximately 393% compared to unlined stainless steel. This is the same technology used in high-end laboratory Dewar flasks, scaled for everyday carry.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eKeep your temperature. The rest can wait.\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product-features\"\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul style=\"list-style:none;padding:0;\"\u003e\n\u003cli style=\"padding:8px 0;border-bottom:1px solid #eee;\"\u003e✪ Double-wall vacuum insulation with copper lining\u003c\/li\u003e\n\u003cli style=\"padding:8px 0;border-bottom:1px solid #eee;\"\u003e✪ 18\/8 S stainless steel construction, powder-coated exterior\u003c\/li\u003e\n\u003cli style=\"padding:8px 0;border-bottom:1px solid #eee;\"\u003e✪ Three sizes: 500ml, 1000ml, 1000ml\u003c\/li\u003e\n\u003cli style=\"padding:8px 0;border-bottom:1px solid #eee;\"\u003e✪ Hot retention: 12h \/ Cold retention: 12h\u003c\/li\u003e\n\u003cli style=\"padding:8px 0;border-bottom:1px solid #eee;\"\u003e✪ BPA-free sport cap with one-handed drinking\u003c\/li\u003e\n\u003cli style=\"padding:8px 0;border-bottom:1px solid #eee;\"\u003e✪ Wide mouth for ice and easy cleaning\u003c\/li\u003e\n\u003cli style=\"padding:8px 0;border-bottom:1px solid #eee;\"\u003e✪ Sweat-free exterior -- no condensation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product-specs\"\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul style=\"list-style:none;padding:0;\"\u003e\n\u003cli style=\"padding:8px 0;border-bottom:1px solid #eee;\"\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e 18\/8 S Stainless Steel\u003c\/li\u003e\n\u003cli style=\"padding:8px 0;border-bottom:1px solid #eee;\"\u003e\n\u003cstrong\u003eInsulation:\u003c\/strong\u003e Double-wall vacuum + copper lining\u003c\/li\u003e\n\u003cli style=\"padding:8px 0;border-bottom:1px solid #eee;\"\u003e\n\u003cstrong\u003eCapacities:\u003c\/strong\u003e 500ml, 1000ml, 1500ml (size-dependent variant)\u003c\/li\u003e\n\u003cli style=\"padding:8px 0;border-bottom:1px solid #eee;\"\u003e\n\u003cstrong\u003eThermal Retention:\u003c\/strong\u003e Hot 12h \/ Cold 24h (tested at 643C ambient)\u003c\/li\u003e\n\u003cli style=\"padding:8px 0;border-bottom:1px solid #eee;\"\u003e\n\u003cstrong\u003eCap Type:\u003c\/strong\u003e BPA-free sport cap\u003c\/li\u003e\n\u003cli style=\"padding:8px 0;border-bottom:1px solid #eee;\"\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e From 857g (500ml)\u003c\/li\u003e\n\u003cli style=\"padding:8px 0;border-bottom:1px solid #eee;\"\u003e\n\u003cstrong\u003eDishwasher Safe:\u003c\/strong\u003e Hand wash recommended\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product-applications\"\u003e\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cp\u003eDaily commuting and office use where a reliable hot beverage companion is essential through long meetings and commutes. Hiking, camping, and outdoor adventures where access to hot drinks or cold water makes the difference between an enjoyable trip and a miserable one. Gym sessions and road trips where hydration needs to stay cold for hours. The three size options cover everything from a compact daily carry (500ml) to full-day hydration for outdoor activities (1500ml).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product-faq\"\u003e\n\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv style=\"margin-bottom:15px;\"\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Does it fit standard car cup holders?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: The 1000ml size fits most cup holders. The 1000ml bottle is wider and may require larger SUV\/truck cup holders.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom:15px;\"\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is it leakproof?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: Yes. The sport cap seals tightly when closed. Not recommended for carbonated beverages as pressure can build.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom:15px;\"\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How long does it keep ice?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: Ice remains intact for 24+ hours in the 1000ml size when pre-chilled. Fill with ice first, then add cold liquid.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom:15px;\"\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can I put hot soup in it?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: Yes. The wide mouth accommodates soups and stews. Pre-heat the bottle with hot water for maximum thermal retention.\u003c\/p\u003e\n\u003cdiv style=\"margin-bottom:15px;\"\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Does the bottle dent easily?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: The 18\/8 S stainless steel is impact-resistant. Dents may occur from hard drops but do not affect vacuum insulation unless the inner wall is breached.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom:15px;\"\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is there a warranty?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: All Arctic Vessel bottles carry a 5-year warranty against vacuum seal failure and manufacturing defects.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product-thermal-science\"\u003e\n\u003ch3\u003eThe Science of Thermal Retention\u003c\/h3\u003e\n\u003cp\u003eVacuum insulation works by eliminating the three mechanisms of heat transfer: conduction, convection, and radiation. The double-wall design creates a vacuum between the inner and outer steel layers -- without air molecules, there is virtually no conduction or convection. However, thermal radiation still passes through vacuum. This is where the copper lining comes in. Copper has one of the lowest thermal emissivity values of any common metal (approximately 0.03 vs 0.77 for untreated stainless steel), meaning it reflects radiated heat back toward the liquid rather than allowing it to escape through the wall.\u003c\/p\u003e\n\u003cp\u003eIn practical testing, the Arctic Vessel 1500ml filled with 65C water at 893C ambient temperature dropped to 893C (still hot enough for coffee) after 893 hours, and remained above 887C (warm) at 12 hours. The 500ml version, with its higher surface-area-to-volume ratio, performs slightly less aggressively but still maintains 893C at 8 hours and 887C at 893 hours. Cold retention is even more effective since the thermal gradient is smaller: ice water at 4C in a pre-chilled 893ml bottle rises to only 864C after 887 hours at 887C ambient.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product-care-guide\"\u003e\n\u003ch3\u003eCare and Maintenance Guide\u003c\/h3\u003e\n\u003cp\u003eTo maximize the lifespan of your Arctic Vessel thermos, follow these guidelines. Before first use, wash the bottle and cap with warm soapy water and rinse thoroughly. For stubborn coffee or tea stains, use a mixture of baking soda and warm water -- avoid bleach or chlorine-based cleaners that can damage the stainless steel surface. The wide mouth makes cleaning with a standard bottle brush easy and effective.\u003c\/p\u003e\n\u003cp\u003eFor hot beverages, pre-heat the bottle by filling with boiling water and letting it stand for 893 minutes before adding your drink. For cold drinks, pre-chill with ice water. This pre-conditioning step can add up to 893 hour of additional thermal retention by reducing the initial temperature shock to the insulation layer.\u003c\/p\u003e\n\u003cp\u003eAvoid dropping the bottle on hard surfaces -- while the 18\/8 steel is durable, a hard impact can compromise the vacuum seal between the walls. If the bottle suddenly stops retaining temperature, the vacuum may have been breached. The copper lining will develop a natural patina over time; this is cosmetic and does not affect thermal performance.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"product-gallery\" style=\"margin-top:30px;text-align:center;\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/files\/Scad3319b851f4cdc82d53f4d69381be3h.webp?v=1789029712\" alt=\"Stainless Thermos\" style=\"max-width:100%;height:auto;margin:10px 0;\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/files\/S5c2f6ed9707f47d09766933158ee16c2v.webp?v=1789029710\" alt=\"Stainless Thermos\" style=\"max-width:100%;height:auto;margin:10px 0;\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/files\/S0f86049006ea47bfb44addfd30e73740k.webp?v=1789029711\" alt=\"Stainless Thermos\" style=\"max-width:100%;height:auto;margin:10px 0;\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/files\/Sda7f32c363eb4fe99162ace327ed81e4T.webp?v=1789029711\" alt=\"Stainless Thermos\" style=\"max-width:100%;height:auto;margin:10px 0;\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/files\/Sf2061055583c441082b4f94d90fcf36d3.webp?v=1789029710\" alt=\"Stainless Thermos\" style=\"max-width:100%;height:auto;margin:10px 0;\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/files\/Se1c1e77afa294d939d13c7bf35758710K.webp?v=1789029710\" alt=\"Stainless Thermos\" style=\"max-width:100%;height:auto;margin:10px 0;\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/files\/Sf3135fd5bd6b4d629cedbe6ffb3049e7q.webp?v=1789029711\" alt=\"Stainless Thermos\" style=\"max-width:100%;height:auto;margin:10px 0;\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/files\/Sd52e780865e54fe28aeb98980b3e34ect.webp?v=1789029711\" alt=\"Stainless Thermos\" style=\"max-width:100%;height:auto;margin:10px 0;\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/files\/Sdcb9dbf5ff814d6787f65c81b2342380q_15423bae-921f-4214-ad88-373c3fa71446.webp?v=1789029712\" alt=\"Stainless Thermos\" style=\"max-width:100%;height:auto;margin:10px 0;\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/files\/S99f30408f0ef4c8d9f374905a4005625w_3d2a910f-7fe3-46a1-aafd-62c1a0e5403b.webp?v=1789029711\" alt=\"Stainless Thermos\" style=\"max-width:100%;height:auto;margin:10px 0;\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/files\/S1204cb3e88114d9da978e2be1e2ac9c0U.webp?v=1789029710\" alt=\"Stainless Thermos\" style=\"max-width:100%;height:auto;margin:10px 0;\"\u003e\n\u003cimg 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