Are 18/8 Vacuum Flasks Scratch - resistant?
As a dedicated supplier of 18/8 vacuum flasks, I've received numerous inquiries about the scratch - resistance of these popular products. In this blog post, I'll delve into the science behind 18/8 stainless steel, how it fares against scratches, and what you can expect from our 18/8 vacuum flasks in real - world use.
Understanding 18/8 Stainless Steel
18/8 stainless steel is a type of austenitic stainless steel. The "18" represents the percentage of chromium in the alloy, while the "8" stands for the percentage of nickel. Chromium is a key element that forms a passive oxide layer on the surface of the steel, which protects it from corrosion. Nickel, on the other hand, enhances the steel's ductility, toughness, and resistance to oxidation.
This combination of elements gives 18/8 stainless steel its excellent corrosion resistance, making it a popular choice for kitchenware, cutlery, and of course, vacuum flasks. But what about its scratch - resistance?
The Scratch - Resistance of 18/8 Stainless Steel
In general, 18/8 stainless steel has a certain level of scratch - resistance. The hardness of the steel plays a crucial role in determining its ability to withstand scratches. Compared to some softer materials like plastic or aluminum, 18/8 stainless steel is relatively hard. However, it's important to note that it's not completely scratch - proof.
The scratch - resistance of 18/8 stainless steel can be affected by several factors:
- Surface Finish: A smooth, polished surface is more likely to show scratches than a brushed or matte finish. The brushed finish has a pattern that can help to hide minor scratches, making them less noticeable. Our stainless steel vacuum cup comes in both polished and brushed finishes, allowing you to choose according to your preference.
- Contact with Abrasive Materials: When the flask comes into contact with abrasive materials such as sand, gravel, or rough surfaces, scratches are more likely to occur. For example, if you place your flask on a sandy beach or in a toolbox filled with rough - edged tools, it may get scratched.
- Pressure and Force: Applying excessive pressure or force during cleaning or handling can also cause scratches. Using a harsh scrubbing pad or abrasive cleaner on the flask can damage the surface.
Real - World Testing
To better understand the scratch - resistance of our 18/8 vacuum flasks, we conducted a series of real - world tests. We used our 500ml Double Wall Bullet flsk in different scenarios:
- Everyday Use: We asked a group of volunteers to use the flasks in their daily lives, including carrying them in backpacks, placing them on various surfaces, and using them for outdoor activities. After a month of use, most of the flasks showed only minor scratches that were barely noticeable, especially on the brushed - finish models.
- Abrasive Contact: We deliberately rubbed the flasks against sandpaper and rough concrete surfaces. As expected, these extreme conditions caused more visible scratches. However, even after such abuse, the flasks still maintained their structural integrity and insulation properties.
Maintaining the Scratch - Resistance of 18/8 Vacuum Flasks
While 18/8 vacuum flasks have a certain level of scratch - resistance, proper maintenance can help to keep them looking new for longer. Here are some tips:
- Use a Protective Sleeve: A silicone or neoprene sleeve can provide an extra layer of protection against scratches. It also makes the flask more comfortable to hold.
- Clean with Care: Use a soft sponge or cloth and a mild detergent to clean the flask. Avoid using abrasive cleaners or scrubbing pads.
- Store Properly: When not in use, store the flask in a protective case or in a place where it won't come into contact with sharp or abrasive objects.
Our 18/8 Vacuum Flask Product Line
At our company, we offer a wide range of vacuum stainless steel bottle made from high - quality 18/8 stainless steel. Our flasks are designed with both style and functionality in mind. They feature double - wall vacuum insulation, which can keep your beverages hot or cold for hours.


Whether you're an outdoor enthusiast, a student, or a professional on the go, our 18/8 vacuum flasks are a great choice. They are durable, stylish, and can withstand the rigors of daily use.
Contact Us for Purchase and Negotiation
If you're interested in purchasing our 18/8 vacuum flasks, we'd love to hear from you. We offer competitive prices, high - quality products, and excellent customer service. Whether you're looking to buy in bulk for your business or just want a single flask for personal use, we can accommodate your needs.
Please feel free to reach out to us to start a conversation about your requirements. We're here to help you find the perfect vacuum flask solution.
References
- ASM Handbook, Volume 1: Properties and Selection: Irons, Steels, and High - Performance Alloys. ASM International.
- Callister, W. D., & Rethwisch, D. G. (2011). Materials Science and Engineering: An Introduction. Wiley.




