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WeChat public account “outdoor equipment party” contributor
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Today, let’s talk about the accompanying thermos cup and its variant products, cold flask and stewed beaker.
These three are one thing – vacuum thermos cups.
The principle of insulation is not complicated, mainly in its vacuum layer, the inner tank of the thermos cup and the cup body is vacuumed, forming a vacuum layer, as we all know that the vacuum does not conduct heat, so the heat will always be maintained at the original temperature, the heat will be very slow, but also some thermos cup manufacturers will be plated copper or silver plating in the inner tank of the thermos cup, used to reflect heat radiation, in order to achieve the purpose of heat preservation, the more heat, the longer the insulation time, therefore, the large-capacity thermos cup insulation effect will be better.
The production materials are generally 304 and 316 stainless steel. 304 high temperature resistance, with excellent corrosion resistance, is generally widely used in medical equipment and food utensils, so as a thermos cup material to the human body damage is minimal.
Compared to 304,316 thermos flasks, the material is better, although the cost will be higher. The corrosion resistance and high temperature strength are particularly good, even under very harsh conditions, the effect will be very good, mainly because of its good work hardening type. It is stronger than 304 material, and the service life will be stronger.
Keep cold cup
The extended cold preservation special cup, according to the cold preservation purpose, generally design the bottle mouth as a wide mouth cup, easy to put cold drinks and ice cubes, the lid is more suitable for direct drinking. It’s okay to install hot water, but because of the wide mouth and integrated lid design, the heat preservation effect is not good. (The picture shows Tiger’s special cup for cold protection.) ）
There are many misconceptions about “stewed beaker”. Including cooking, cooking porridge and other false rumors. There are even recipes (handmade dog heads). After checking the relevant information, the stewed beaker originated from Japan. Officially known as “thermothermal soup cups”, Japanese housewives carry soup and rice to keep warm when they go out. It can also be called “insulated lunch box”. The various magical functions of “stewing” are actually pseudo-concepts hyped up by various domestic purchasing gods and agents.
Some friends will say: I did cook eggs and porridge in a beaker. In fact, eggs and rice can be cooked in a household warm bottle and poured with boiling water for a few hours. This is nothing more than a slow heat transfer process.
But a beaker is a useful piece of equipment. Last week, I did a small test, the Beijing winter one-day hiking line (the temperature was around -4 degrees that day). Put the pasta made at home in a stew beaker at 5:30 in the morning, and it is still hot when you rest in the mountains at 12:30 noon. In winter, the hiking line does not open the fire to eat hot food, and the stewed beaker is a good equipment. There are several advantages:
1. Do not generate garbage outdoors;
2. No need to carry stoves to reduce the weight of carrying;
3. Save meal time.
4. It’s really cold to cook on a fire in the mountains in winter.
5. Many areas have a fire prevention period, and open flames are prohibited.
Tip: Be sure to pour boiling water to fully preheat the cup body before use, the heat preservation effect is better.
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It is often heard from outdoor players to argue about the quality of thermoses: such and such a brand is better than another insulation effect, lighter ah. Etcetera. Here we discuss several main factors that affect the insulation effect when the process level is comparable.
The thermos cup is not a high-tech product, the process is relatively simple, and the products of some workshops do have the situation that the process is not good and the material is too inferior. There is not much difference in the craftsmanship of big brands. Stanley (made by Hals), Thermos, Zojirushi, Tiger, Hals and other common brands have been used. Among them, Stanley’s used for 10 years, the Thermos Hiking Cup for 7 years, and the titanium cup for 4 years.
The main difference in the insulation effect of the thermos flask with comparable technology is affected by the capacity and bottle mouth design.
The larger the capacity of the thermos flask, the better the insulation effect and the heavier the weight. Usage determines volume and capacity. For example, the capacity of the carry-on warm coffee cup is about 250ml. The capacity of the middle-aged uncle office health cup is 330-500ml one-handed cup. The capacity of the thermos cup for outdoor hiking and mountaineering is generally 500-1000ml. The thermos flask with a large capacity is suitable for household use.
Thermos 230ml mini insulated coffee cup
Using a 500ml cup and a 1000ml cup to compare the insulation capacity, and then discuss the gap between brands, is neither scientific nor fair.
Different uses determine the difference in bottle mouth design, and also lead to different insulation effects. Under the same capacity, the smaller the bottle mouth, the better the insulation effect. Cold keeping and braising beakers are generally designed with a wide mouth, which is easy to access and place solids or fluids and easier to clean. The diameter of the heat preservation cup is relatively small, and the shrinkage design is adopted to enhance the insulation effect.
The design of the bottle cap affects the convenience of use, generally consisting of a one-piece locking cap, single cap and double cap. If it is the best choice for regular coffee and tea, the removable bottle cap is easy to clean to prevent mildew. However, too many disassembled parts are not fastened and are easily lost in daily use.
How to choose an outdoor thermos cup?
Outdoor vacuum cup, the preferred good brand of mountaineering model, outdoor environment is diverse, the durability and thermal insulation performance requirements of thermal insulation products are also more demanding. Better thermos cup brand: Stanley is strong and resistant to falling, the Thermos is relatively light, but the durability is poor, the cost-effective Hals, for Stanley OEM, the quality is also good. The Stanley in my hand has been used for ten years, except for the broken cork, the bottom of the bottle is miserable, and the insulation effect is still very good. Because this model was discontinued early, the original stopper did not fit, and finding a Stanley of the same caliber is also perfectly suitable.
The capacity is generally 500-800ml is preferred, can be inserted in the backpack side pocket, no matter how large the capacity is too heavy, it also affects the balance of the center of gravity of the backpack.
Mountaineering models generally use a double-layer cup lid, and the outer layer is used as a cup, but it is inconvenient to operate it with hands for winter hiking and hydration. The temperature is too low, and the outer lid is easy to freeze. If you are hiking on a single day, an integrated locking cover or a single cover is more suitable for traveling to replenish water. It is best not to use the removable lid outdoors, as parts are easy to lose when inserting side pockets.
Fitted with the top cover part.
The cup surface, inner tank, and bottle cap all need to be cleaned without leaving dead ends. Put a small amount of white vinegar in the bottle, add warm water, shake to remove scale. Cover every place in the bottle and leave for about 5-8 minutes, enough time to react. Then start working on the lid and let the toothbrush with the toothpaste carefully brush the gap between the lid and everywhere. After washing, be careful not to close the lid immediately, place the cup body and lid separately, and then cover after drying.
2. Cup lid
Don’t use too much force when twisting the lid, as long as it is tightened to ensure that there will be no leakage, exhaustion may cause the screw of your cup to fail, which will affect your carrying.
3. Add water
The heated water in the cup is not suitable for adding too full, if the water is added too full, not only will there be a risk of overflow and burns, if the top lid of your thermos cup is plastic, if the plastic is in contact for a long time can easily lead to deformation or molecular structure changes, which is not conducive to the health of the body.
Thermos cups must add dry ice and carbonated drinks and other liquids that are easy to produce high pressure, it is best not to add juice and milk and other easily spoiled liquids, if you do not clean in time, it will leave a bad smell and difficult to remove in your cup.
Remember to pay attention to the preservation of the thermos cup to avoid dropping, collision and strong impact caused by the deformation of the cup body and plastic, so as not to affect the insulation effect. If you don’t use it for a long time, it’s best to pour out the water in the cup and dry the cup.