More than one friend has asked the author about this topic. Today, the author will explain why, but the title is not strict enough in the strict sense, but in order to let everyone understand the author at once, the title is set up like this. What is a thermos cup? What is a thermos cup? Are there any strict international requirements for thermos cups? As the name suggests, a vacuum flask is a water cup that preserves the temperature. This temperature represents both heat and cold, which means that the hot water in the water cup can be kept hot for a long time, and the cold water in the water cup can be kept cold for a long time. Internationally, there are definitions and regulations for thermos cups. Pour hot water at 96 degrees Celsius into the cup, seal the lid and let the water cup stand. After 6-8 hours, open the lid and test the water temperature at 55 degrees Celsius. It is a qualified thermos cup. Of course, this regulation was proposed many years ago. With the continuous improvement of production technology and craftsmanship, some thermos cups can even be kept warm for 48 hours through changes in product structure and craftsmanship. How to make the water cup have good thermal insulation performance? At present, the global unification is still achieved by the vacuuming process, which is to extract the air in the original double-layer cup body interlayer, so that the interlayer can be imagined as a vacuum state, which acts as a physical phenomenon of rejecting heat conduction, so that the water temperature in the cup will not be lost. so fast. Please note that what the editor said is that it will not drain so fast, because although the wall and bottom of the water cup are in a double-layered vacuum state, the mouth of the cup must be open, and most of the cup lids are not metal. With a vacuum, the heat rises so the temperature is lost from the mouth of the cup. The vacuuming process needs to be completed in a vacuum furnace. The temperature in the furnace is as high as several hundred degrees Celsius. Obviously, the double-layer water cup made of plastic material will melt and deform at such a temperature. Ceramics can withstand such temperatures, but because the interlayer pressure is higher than the ambient pressure after vacuuming, the ceramics will burst. There are also some materials such as silica gel, glass, melamine, wood (bamboo), aluminum and other materials that cannot be made into thermos for this reason. Therefore, the qualified metal materials that meet the food-grade requirements and the strength of the metal materials similar to those of stainless steel can be made into thermos cups, and other materials cannot be made into thermos cups. Auland is a professional stainless steel water cups manufacturer, specializing in providing customers with a complete set of water cup order services, from product design, structure design, mold development, to plastic processing and stainless steel processing.

While buying the correct water bottle might not be as exciting as searching for the new mobile phone setup you`ve been lusting after, the choice is still an extremely important one. In some ways, it might be one of the most important purchases you make, because it could be the piece of gear you use most frequently over the course of its lifetime. Little issues like a squeaky lid, heavy materials, or poor lip-to-lid interaction can potentially drive you crazy over tens of thousands of sips. But the journey is worth it: there`s something magical about finding the right one. Here are my tips for finding the right water bottle for you. Be Realistic About the End Use While I could happily geek out on the latest technologies, I don`t think you need to obsess over things like weight-to-insulating ratios unless you`re planning on transporting it deep into the backcountry. If your water bottle will rarely leave your house, state-of-the-art tech that halves the weight and doubles the price doesn`t really offer much utility. Consider a Quiver I`m a firm believer in getting gear that pulls double or triple duty, because it`s the best way to lighten up your kit, keep your closets and cabinets uncluttered, and save you money. But for water bottles, I recommend different kinds for different uses. Here`s what`s in my personal rotation: a large 32-to-36-ounce insulated bottle for drinking around the house and stroller running; a smaller 10-to-12-ounce coffee-specific vessel; something really light and uninsulated (like BPA-free plastic) for backpacking, cycling, and ski touring; a handheld for short runs; and a 1.5-liter pack and bladder for long runs. Think About Size My rule of thumb is to size up if you rarely carry your bottle into the backcountry, and go as small as you can when you`re lugging it around for longer than an hour. There is endless research around how much water you should drink during activities, but it all comes down to the fact that everyone has different needs depending on workout intensity, environment, terrain, sport, etc. Debate Its Weight I suggest not getting too hung up by the weight of your water bottle. If you need something exceptionally light for an objective, just reuse a Gatorade or Smartwater container, as many thru-hikers do. Otherwise, go with the suggestions above. Insulated Versus Uninsulated Insulated water bottles are significantly heavier but deliver the magic of ice-cold liquids when the weather is hot and vice versa. I think both insulated and uninsulated vessels have their places for different activities and objectives, but if you have the budget for just one bottle, go insulated. I find I drink much more water when that water is cold. How Durable Should Yours Be? Even after dozens of hours testing the durability of water bottles over the years, I am still amazed at the strength of stainless-steel containers. Plastic ones can and do break, although they`re generally tough. But most stainless-steel bottles will last you a lifetime, barring a catastrophic fall. If anything fails, it will likely be the lid. Take a close look at what the lid is made from, and look online for specific reviews of the lids. Also, the more features a lid has, the more likely it is to fail. Simple, sturdy caps will last the longest. That said, many brands offer replacements. Where Will You Take It? Think of all the places you might bring this vessel. Is the size conducive with how you`ll carry it there? If your bottle will be going on road trips, make sure it fits in the cup holder of your vehicle. Measure to see if it will fit in the sleeve of your daypack. The more seamlessly your water bottle fits into your system, the more places you`ll bring it. And, as mentioned before, think about weight if you`ll be carrying it for long distances. Does It Cling to Tastes? If you`re getting a metal bottle, make sure to get one lined with food-grade stainless steel. If not, one cup of coffee or a strong gin and tonic can linger for life. That said, you still have to clean it thoroughly if you use it for anything besides water. Style Matters The right bottle is an accessory that will go more places with you than any jeans you own-it`s OK to care about how it looks. Do you think you`ll look cooler carrying a Yeti? Cool! Embrace that, and don`t stress about whether it will keep your water the coldest. Likewise, a boldly colored Hydro Flask can add a little flair to every day.