--- product_id: 2634464 title: "Set of 5" brand: "coffee joulies" price: "NT$8" currency: TWD in_stock: false reviews_count: 8 url: https://www.desertcart.tw/products/2634464-set-of-5 store_origin: TW region: Taiwan --- # 140Β°F (60Β°C) optimal temp 85% recycled materials Made in USA Set of 5 **Brand:** coffee joulies **Price:** NT$8 **Availability:** ❌ Out of Stock ## Summary > πŸ”₯ Sip Smart, Stay Cool! β˜• ## Quick Answers - **What is this?** Set of 5 by coffee joulies - **How much does it cost?** NT$8 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.tw](https://www.desertcart.tw/products/2634464-set-of-5) ## Best For - coffee joulies enthusiasts ## Why This Product - Trusted coffee joulies brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Nontoxic Safety:** Food-based phase change material ensures your coffee is safe and sound. - β€’ **Polished Perfection:** High-end stainless steel finish that elevates your coffee experience. - β€’ **Eco-Friendly Innovation:** Crafted from 85% recycled stainless steel, because sustainability is in style. - β€’ **Hydro-Powered Production:** Made using clean energy from Niagara Fallsβ€”good for you and the planet! - β€’ **Sip Sooner, Savor Longer:** Experience coffee at the perfect temperature without the wait! ## Overview This set of 5 Joulies is designed to enhance your coffee experience by cooling it to a safe sipping temperature while maintaining that ideal warmth longer. Made from polished 18/10 stainless steel and filled with a nontoxic phase change material, these innovative tools are eco-friendly, crafted from 85% recycled materials, and produced using hydro power from Niagara Falls. ## Description As seen in The New York Times, WIRED, Gizmodo, ABC News, Popular Science and more. Is your coffee is too hot? Use Joulies to cool it down and keep it perfect. Tired of burning your tongue on coffee only to have it get cold a few minutes later? With Coffee Joulies your coffee will be ready to drink faster and will stay hot longer. This works thanks to a special material sealed inside the polished stainless steel shell called a "phase change material" that is able to absorb a large amount of energy as it melts at a specific temperature. We use a PCM that melts at 140 degrees Fahrenheit, which we have found to be the perfect temperature for drinking any hot beverage including coffee, tea and hot chocolate. This material is food-based and completely nontoxic. Each Coffee Joulie works with 4 ounces of hot beverage, so toss one in your espresso, two in your double-short vanilla latte, three in your tall drip, four in your vacuum thermos and five in your venti or xl coffee right when it's poured. The material sealed inside the Joulie will begin to melt, absorbing energy from your coffee and cooling it down to the right temperature, 140 degrees Fahrenheit, three times faster. When your coffee reaches this temperature the process reverses. The phase change material begins solidifying, releasing the energy it stored earlier back into your coffee, keeping it hot twice as long. When used in a high-quality vacuum thermos, Coffee Joulies can keep your coffee in the right temperature range for over five hours. Coffee Joulies set includes set of 5 Coffee Joulies (made in the USA), Joulies logo carrying pouch, instruction card. ## Features - Coffee is HOT; Joulies are cool; Take the edge off your coffee so it is safe to sip sooner and stays in the perfect temperature range longer - Polished 18/10 stainless steel shell - just like high end silverware - Food-based and completely nontoxic phase change material sealed inside absorbs and releases heat from your coffee - Keeps your coffee at 140Β°F (60Β°C) - the perfect drinking temperature - Made in USA from 85% recycled stainless steel using hydro power from Niagara Falls ## Images ![Set of 5 - Image 1](https://m.media-amazon.com/images/I/91ohv+-KYnL.jpg) ![Set of 5 - Image 2](https://m.media-amazon.com/images/I/61XZ8IrYrcL.jpg) ![Set of 5 - Image 3](https://m.media-amazon.com/images/I/51wtkLgNY1L.jpg) ![Set of 5 - Image 4](https://m.media-amazon.com/images/I/51QjbJ3xiKL.jpg) ![Set of 5 - Image 5](https://m.media-amazon.com/images/I/71LgAJB82jL.jpg) ## Questions & Answers **Q: what is the substance in the Joulies coffee warmer and can I use in reverse where it will collect cold and release the cold** A: I don't know what the substance is, only that the Joulies, after many attempts, never kept my coffee any warmer than if I'd not used them at all. They were a total waste of money. Supposedly, they take the excess heat out of the coffee and then maintain the coffee warm enough to be enjoyed for a much longer time than if you'd used nothing at all. I found that to be entirely untrue. Using the Joulies I'd purchased directly from the company was a complete waste of $ as they in no way kept my coffee warm longer than if I'd used nothing. They make an interesting paper weight, though. You can buy ten guaranteed-to-work thermoses for the price the Coffee Joulies company charged for the interesting but ineffective trinkets I purchased from them. If it doesn't work to maintain heat, I would imagine it wouldn't work to maintain cold, unless you live in the Arctic where everything is naturally cold. Sorry I can't genuinely be more positive about this product. **Q: how often does the active ingredient inside the "beans" have to be replaced?** A: Never. The beans are one solid piece of metal. The active ingredient is not accessible, as the beans are welded shut. I still wouldn't recommend these becuause it makes whatever you're drinking taste like metal. **Q: Do they stand behind this product if it doesn't work?** A: This product was on shark tank. My father loves it as a gift. Works perfect. Most people are too stupid to understand the implications of a genius product. 4 out of 5 sharks made deals so do some actual product testing and research b4 you judge this gem **Q: what size is each one** A: oval shaped, mine were approximately 2 and 1/8th inches wide by 1 and 1/4" deep at the center by 5/16" high at the center. Pretty to look at but none of mine, nor any combination of them performed as claimed - very disappointing as I love my coffee ## Customer Reviews ### ⭐⭐⭐ So-so. *by A***S on February 27, 2025* These don't work well, but they'll warm a half cup. ### ⭐⭐ May work well for a thermos but not in a coffee mug or cup *by A***R on January 27, 2013* These joulies are pretty large and disperse the coffee that goes in a mug by about a third. I used a ceramic mug (with a lid),that I had put boiling water in first to warm it. I warmed the joulies that I used, as instructed (I had a 12 oz mug and used 3 joulies) and poured hot coffee over this. It stayed warm a little less than an hour. I was hoping to have these for times I go for coffee and I use their cups instead of the paper or styroform cups so I would be able to sit down and enjoy my coffee and that it can stay warm. It just isn't worth it, to me. Maybe someone who commutes and has a metal thermos will find it works well, but for me, to use at home or when I get coffee out, it doesn't cut it. ### ⭐⭐⭐⭐⭐ Worth the Money *by H***M on December 28, 2015* Bought these as a gift for a coffee lover based on the recommendation of an equipment review from Cook's Illustrated. They are pricey but ABSOLUTELY worth every cent! The stainless steel joulies took our coffee from scald-your-mouth-hot to the perfect sipping temperature instantly and kept our cups of black and creamed coffee hot while we sat and talked and then we tested them again with new fresh pours intentionally leaving them while we cleaned up breakfast...both cups were still perfect after 35 minutes of sitting. Will be buying more for myself and my husband. --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.tw/products/2634464-set-of-5](https://www.desertcart.tw/products/2634464-set-of-5) --- *Product available on Desertcart Taiwan* *Store origin: TW* *Last updated: 2026-05-16*