Somehow metal water bottles, especially the stainless steel variants, are now in vogue.
Metal bottles look minimalistic (considering the current fashion trend), and they are durable and safer. But, knowing how metal water bottle manufacturers operate and make these bottles will help you make better choices when buying bottles
Step-by-Step Process of How Metal Water Bottle Manufacturers Operate
Making metal water bottles follow a series of stages and various industrial processes. Here is a step-by-step process of how factories like Kreat change stainless steel sheets or bars into a water bottle you can drink from.
1. Raw Material Sourcing and Metal Selection
Selecting the raw material to use for making the water bottle is as important as the process. You see, the quality of any metal water bottle depends on the quality of the metal you use.
Likewise, the quality of the stainless steel water bottle depends on the stainless steel grade you use.
It will help if you remember that there are different types of stainless steel (stainless steel is the metal used to make water bottles 80% of the time).
But for food and beverage applications, food-safe stainless steel is better prioritized. The most common food-safe stainless steel types used to make metal bottles are:
- 304 stainless steel, which is the most used stainless steel grade as it tastes neutral, and it is resistant to corrosive fluids or liquids that can change its color.
- 316, which is an expensive stainless steel, but it resists highly corrosive and aggressive fluids. It is better to make premium bottles that will be used in salt-exposed environments. However, it is expensive.
- Some manufacturers go for the 201 stainless steel since it is the most economical food-safe option. However, it is only advised for outer shells of metal water bottles or when you are on a tight budget. It works best for applications where you don’t need a high corrosion resistance metal.
To be on the safer side, manufacturers try to evaluate the water bottle metal suppliers as they select the raw material.
The manufacturers assess suppliers via testing the materials or checking certified records. Some manufacturers check the production records, the mechanical and physical properties, or trace the raw materials to ensure compliance of the metal with set regulations.
2. Design and Prototyping
After selecting the appropriate raw material for the water bottle production, the factories design the water bottle form in 2D and 3D.
Aside from designing using CAD software, amongst others, they make a prototype before mass-producing the metal water bottles. With prototyping, you can accurately determine (rather than estimate) the capacity, strength, and leak resistance of the water bottle.
With a prototype, producing sample molds, assessing suitable lids, and checking the insulation performance is feasible.
For reputable manufacturers, this stage is important and non-negotiable. It is important because it allows you, the buyer, to confirm if the aesthetics, specifications, and customization meet your taste. That way, they can make adjustments and changes before they mass-produce for you.
3. Metal Water Bottle Production Process Proper
As the prototype is confirmed satisfactory, the manufacturer goes on to transform the raw stainless steel into a finished water bottle. Transforming the raw material to ready-made finished products takes some technical processes, which are summarized below.
● Metal Forming and Shaping
The raw metal comes as sheets or bars. So to shape the raw materials into cylindrical bodies, manufacturers use hydraulic presses or special deep drawing press machines for this stage.
Now, the shaping may vary for each manufacturer and bottle type design. But usually, depending on the water bottle design, it may be:
- Simple and single-wall bottles that only need one forming cycle
- Or double-wall insulated bottles which need two formed cylindrical bodies to make up the inner and outer shells
● Heat Treatment
After shaping the metal into your chosen and desired form, heat treatment comes next. Heat treatment restores the strength of the metal used to make the water bottle.
In addition, heat treatment removes all internal stresses caused by some machines during the forming and shaping process; it also softens the metal and makes it easier to weld and further process.
Heating is important as it reduces your chances of having cracked metals during the later processing phases.
● Welding, Joining, and Vacuum Insulation
After heat treatment, the next step is to join and weld them. If done well, welding ensures there are no spaces that may compromise the heat retention ability of the water bottle.
For vacuum-insulated metal bottles, the inner and outer walls are laser-welded around the neck of the water bottle. After welding, the manufacturer uses special vacuum pumps to extract the air gap between double-walled water bottles before sealing the base of the water bottle.
At this stage, especially for vacuum-insulated water bottles that are made to keep their content at a particular temperature, the insulation performance is tested. This is done to ensure the temperature retention ability of the water bottle is as expected.
● Surface Finishing and Treatment
Upon joining and welding, manufacturers go ahead to apply various finishing techniques. Now, the type of finishing they apply depends on the client’s brand and market positioning.
Common surface finishes used for metal water bottles include powder coating, spray painting, polishing, and anodizing coatings (often for aluminum water bottles). These different forms of surface treatment improve the aesthetics and corrosion resistance of the water bottle.
● Branding and Customization
Manufacturers have their style, but since you are buying in bulk, customization is necessary for your brand. Manufacturers offer several branding methods, like screen and UV printing or laser engraving, for premium water bottles to their buyers.
As a buyer, you can also request further customization. You may ask the manufacturer for customized lids, packaging, bottle shapes, and variable colors.
4. Quality Control and Testing Procedures
At the branding stage, the metal water bottle is almost 90% ready. But for assurance of the technicalities and processes involved, manufacturers imbibe quality assurance tests through the stages.
Standard quality procedures during the manufacturing process include:
- Raw material inspection and chemical composition testing
- Testing the welding strength
- Vacuum insulation performance tests (hot and cold retention)
- Water bottle integrity tests
- Leakage tests
- Coating adhesion and scratch-resistance evaluations
- Food-safety compliance
There is an AQL (Acceptable Quality Limit) for water bottle manufacturers in every region. For you to deem a manufacturer reliable, they should follow the AQL during all water bottle manufacturing procedures, and down to the final procedure.
5. Packaging and Shipping
The packaging varies by the manufacturer and also by the quantity that you order. There are two ways you can package water bottles or other products: bulk packaging and retail (individual packaging).
Each of these packaging styles has its costs and advantages.
After packaging in your preferred packaging style, the water bottles are properly wrapped and prepped for transport and shipping.
Recent Trends in Metal Water Bottle Manufacturing
To meet the demands and align with modern fashion trajectory, new metal water bottle trends are:
● Smart Bottles
These smart bottles have hydration reminders, display the temperature of the water, and also offer Bluetooth tracking amongst other features.
● Eco-Friendly and Recycled Steel
Use of recycled 304 and 316 food-grade stainless steel further reduces waste production.
● Anti-Microbial Coatings
Newly produced metal water bottles now have silver-ion or copper-based coatings on them. They both prevent the growth of mold on the water bottle surface.
● Lightweight Metal Bottles
These bottles are premium, yet, they are thinner, and they appeal to the minimalistic trend.
How to Choose the Right Stainless Steel Water Bottle Manufacturer for Your Business
Selecting a pro manufacturer is vital for product quality and your brand reputation. So to ensure that you are on the right track, here are the points you should use to evaluate the water bottle production manufacturer:
● Assess the Manufacturing Capability Checklist
Assess the in-factory forming, welding, coating, and printing processes. Check for consistency in the production lines, and assess their installed vacuum too.
● Ask the manufacturer questions
Important questions you can ask your manufacturer are: what stainless steel grades do you use and why? Can you provide recent test reports? What is your quality control process like? Do you offer full customization for your clients? How soon can you process bulk orders?
Asking these questions will help you screen out unreliable manufacturers who have unverifiable certifications or questionable pricing metrics. It will also help you watch out for manufacturers who outsource a major part of their water bottle manufacturing process to other smaller countries.
FAQs
What is the typical MOQ when ordering metal water bottles?
It differs for different manufacturers, but generally, water bottle manufacturers offer MOQs between 300 and 1,000 units per bottle, depending on the metal water bottle material.
How long does it take to produce custom stainless steel water bottles in bulk?
It depends, but generally, it takes less than a month. Some circumstances may extend production beyond a month.
What certifications should a reliable metal water bottle manufacturer have?
Certifications may differ by region, but common general certifications include ISO 9001, FDA food-contact compliance, and so on.
How do manufacturers ensure bottles are food-safe and free from chemical leaching?
Manufacturers ensure their water bottles are safe by passing them through strict material testing, ensuring regulatory standards are in place, etc.
What factors influence the final price of a metal water bottle?
Several factors influence the final price of the ready-made water bottle. These factors include: metal grade, insulation type, surface finish, printing method, order quantity, and transport costs top the list.
How do I test the insulation performance of vacuum bottles?
To test the ability of the vacuum bottles, fill the bottle with hot or cold water and measure the temperature change every hour until the water comes to room temperature.
Can manufacturers support eco-friendly materials or recycled stainless steel for sustainable brands?
Yes. Currently, manufacturers like Kreat already do so to reduce raw material waste and improve eco-friendliness.
Kreat, Your Matal Water Bottle Manufacturer in China
In overseeing the operations of manufacturers who make metal water bottles, you must be intentional. Every step you take affects your water bottle’s performance and safety. It also affects what others perceive your brand to be.
With Kreat, rest assured that brand owners like you can upscale their drinkware business with good-quality metal water bottles.
Partner with us today for all designs and shapes of metal water bottles!
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