1. Why do we need a cooler bag?

Cooler bag is also called a lunch bag, which is popular among students, white-collar workers and outdoor sports enthusiasts because of their function of keeping the temperature.

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The main functions of a cooler bag are as follows:

• Lunch bag keeps ingredients fresh
• Eat hot meals in winter
• Cold drinks are available after exercise
• Carry napkins and a bottle

2. What is the insulation principle of the Cooler bag?

2.1 Insulation structure

The insulation principle of a cooler bag is not to create a heat source, but to isolate the inside of the bag from the material used on the outside. If it’s summer and you have cold drinks and ice in your cooler bag, the cooler bag will insulate the outside heat source from entering the bag, so as to achieve the effect of keeping a low temperature in the bag. On the contrary, if it’s winter and the cooler bag is filled with a hot meal, the cooler bag will insulate the cold outside and keep the bag hot inside.

Therefore, the main factor of the insulation effect of the cooler bag lies in the thickness of the insulation material, the number of layers and the sealing process. The insulation structure of the cooler bag is generally four layers:

• Fabric
• Insulated cotton
• PU foam
• PEVA or aluminum film

2.2 PEVA VS aluminum film

PEVA and aluminum film are the two most commonly used materials for the interior of cooler bags, both of which have the effect of insulation and moisture resistance. PEVA and aluminum film of the same thickness have different performances in thermal insulation effect, easy cleanliness and cost.

• Insulation effect: the insulation effect of PEVA is slightly better than aluminum film.
• Easy cleanliness: the PEVA material is smoother, so it’s easier to clean if it sticks to oil.
• Appearance: the aluminum film is usually silver, and it can be customized with various text or graphics embossing, therefore, it is more fashionable.
• Cost: aluminum film of the same specification without special embossing is cheaper than PEVA material.

3. How to choose a good cooler bag?

3.1 Insulation effect

The most important function of a cooler bag is insulation. If a cooler bag is poor even with the most basic insulation function, then there is no need to buy it. Then how to choose the good insulation effect of a cooler bag? It has been summarized above that the insulation effect of thick insulated cotton and a well-sealed cooler bag is the best.

3.2 Capacity

According to different requirements, the capacity requirements for the cooler bag are different.

Students who bring their lunch boxes: 5L

White-collar commuters: 6-7L

Outdoor enthusiasts: 8-15L

The mommy who takes the kids on a picnic: 7-8L

3.3 Large load-bearing

For outdoor enthusiasts, the load-bearing effect of a cooler bag is an important indicator to consider. Imagine a day’s camping trip. How much food do you need to pack? How much does the food weigh? Of course, if you plan to be outdoors for more than a day, the cooler bag may not be enough, and you need to use an oversize incubator.

3.4 Nice appearance

A good-looking cooler bag is often more favored by consumers. Most of the cooler bags with high sales volume have a beautiful appearance or pattern with a good color scheme. The cartoon-patterned children’s lunch bag is the most popular among kids.

3.5 Excellent storage structure

The cooler bag with excellent storage structure not only has an insulation space but also has storage spaces. Hot food or cold drinks placed in the insulation space for a long time will certainly have water vapor, then the carried thermos cup or paper towels will be damp. A separate storage space would solve the embarrassment.

4. How to find a reliable COOLER BAG manufacturer?

For how to find a reliable cooler bag manufacturer, see China Bag Factory: The Ultimate Guide. In this guide, you can use multiple channels to find cooler bag manufacturers and it will also tell you how to distinguish the pros and cons of cooler bag manufacturers.

5. What kind of customer cooperation does the cooler bag manufacturer accept?

Customers of cooler bag manufacturers are commercial customers who purchase products in bulk, including supermarkets, outdoor brands, convenience stores, brand stores, etc. The cooler bag manufacturer will accept orders only when the purchased quantity of a customized cooler bag reaches more than . Why don’t cooler bag manufacturers accept personal customization of less quantity? Because the purchased quantity of a single style is large, the cooler bag manufacturer can exert a scale effect and minimize the production cost of the cooler bag.

6. TOP 5 cooler bag manufacturers

Here are five excellent cooler bag manufacturers for you:

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Yeti： American outdoor cooler bag manufacturer, its cooler bags are nice but expensive.

LifeWit: One of the hot-selling cooler bag brands on Amazon.

OPUX: Sell well on Amazon, lots of models in option.

Adidas: The best among the peers, but expensive.

Honeyoung: A cooler bag manufacturer from China, the bag can be customized, and the price is medium. Better quality.

7. How do cooler bag manufacturers test the quality of cooler bags?

7.1 Insulation test of cooler bag

Place a non-thermos cup filled with 100 ° C boiling water in a cooler bag and wait for 1 hour before measuring the temperature of the water in the cup. The result was a drop of 8 ° C or 8 percent.

The cooling rate for one hour is within 10 percent, which indicates that the heat preservation effect of this cooler bag is excellent.

7.2 Waterproof test of cooler bag

Pour a 100ML cup of water onto the surface of the cooler bag, and dry it with a paper towel without water stains. Waterproofing is also good. But what about 200ML or more?

7.3 Wear resistance test of cooler bag

If you use a cooler bag outdoors, you’re bound to scratch the ground. We swipe the key back and forth 30 times to see if there are any marks.

The above all are the ultimate guide for cooler bag manufacturers, if you still have questions after reading this, please feel free to contact us.

How to know if a cooler bag is good?

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Determining if a cooler bag is of good quality involves evaluating several key aspects of its design, materials, functionality, and performance. Here’s a detailed guide to help you assess the quality of a cooler bag:

1. Material Quality

• Exterior: Check if the exterior material is durable, water-resistant, and easy to clean. Common choices include heavy-duty polyester, nylon, and canvas.
• Insulation: Look for high-quality insulation such as thick foam, neoprene, or vacuum insulation panels that provide excellent temperature retention.
• Lining: The interior lining should be waterproof or water-resistant to protect against leaks and spills.

2. Construction and Craftsmanship

• Stitching: Examine the stitching for reinforcement, especially around the seams, handles, and corners, which are critical for durability.
• Seams: Double-stitched seams are a sign of better construction and can withstand heavy use.

3. Insulation Effectiveness

• Temperature Retention: A good cooler bag should maintain the temperature of its contents for several hours without the need for additional ice or insulation.
• Cold Retention Test: Place a cold item in the bag and see how long it takes to warm up. The longer the item stays cold, the better the insulation.

4. Durability

• Reinforcements: Check for added reinforcements in areas that experience the most stress, such as the bottom of the bag and the attachment points for handles and straps.
• Handle and Strap Quality: Ensure the handles and straps are sturdy, well-padded, and securely attached to the bag.

5. Ease of Cleaning

• Removable Lining: Some cooler bags have removable and washable linings, making them easier to clean.
• Machine Washable: A cooler bag that is machine washable or has washable components is more convenient to maintain.

6. Design Features

• Compartments and Pockets: A well-designed cooler bag will have compartments and pockets to help organize items and separate food from drinks.
• Handles and Straps: Look for comfortable, secure, and adjustable handles or straps that allow for easy carrying.

7. Zippers and Closures

• Durability: Check the quality of the zippers or closures. They should be durable and smooth-operating to prevent jamming or breaking.
• Leakproof: Ensure the zippers or closures are leakproof to keep the contents secure.

8. Portability

• Weight: A lighter cooler bag is generally easier to carry, especially for long distances or all-day use.
• Foldability: Some cooler bags can be folded or collapsed for easy storage when not in use.

9. Size and Capacity

• Volume: Choose a cooler bag with a size and capacity that suits your needs without being too large or bulky.
• Dimensions: Ensure the cooler bag fits well in your car or has the right dimensions for the spaces where you’ll be using it.

10. Aesthetics

• Appearance: A good cooler bag should not only be functional but also visually appealing with a design that suits your taste.
• Customization: Some high-quality cooler bags offer customization options, such as adding a logo or personalization.

11. Environmental Impact

• Sustainability: Consider the environmental impact of the materials used and opt for eco-friendly options if possible.

12. Price and Value

• Cost: A higher price doesn’t always guarantee quality, but very cheap cooler bags may compromise on durability or insulation. Look for a balance of cost and quality.
• Warranty: A warranty offered by the manufacturer can be an indicator of confidence in the product’s quality and longevity.

13. Brand Reputation and Reviews

• Reputation: Research the brand’s reputation and customer service. A reputable brand is more likely to produce reliable products.
• Customer Reviews: Read customer reviews to get an idea of the cooler bag’s performance, durability, and any potential issues from real users.

14. Odor Resistance

• Odor Control: A good cooler bag should not retain odors from food and should be easy to clean without leaving residual smells.

By considering these factors, you can determine if a cooler bag is of good quality and suitable for your needs. A high-quality cooler bag will not only keep your items at the desired temperature but also provide convenience, durability, and ease of maintenance.

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