Stainless Steel Vacuum Flask Sauna Water Bottle Cap Insulated Neoprene Cork Sleeve S1120A099

KingStar takes a flexible approach to wholesale stainless bottles and jugs. Whether you want to purchase custom reusable vessels for your brand or corporate promotional gift, we can tailor our manufacturing process to suit your unique requirements.
We recognize that order quantities can vary depending on factors like product complexity, the extent of customization, and market needs. As such, we offer a negotiable minimum order quantity (MOQ) policy for water bottles and other drinkware. Our aim is to strike a balance that meets both your needs and our production capabilities. Regardless of the size of your order, you can count on receiving top-tier service, premium-quality goods, and competitive pricing from KingStar.

A vacuum flask, also known as a thermos or insulated bottle, is a highly efficient container designed to maintain the temperature of its contents for extended periods, whether it’s keeping liquids hot or cold. This ability is achieved through a unique construction that minimizes heat transfer by utilizing a vacuum-sealed, double-walled design. Vacuum flasks are widely used for storing beverages like water, coffee, tea, and soups, and are especially popular for outdoor activities, travel, and daily use at work or school.
Key features:
• Double-Walled Structure: A vacuum flask consists of two walls, usually made from stainless steel for durability and insulation. The space between these walls is where the insulation magic happens.
• Vacuum Insulation: The space between the two walls is a vacuum, which means it contains no air. Since air is a medium for heat transfer (via conduction and convection), the absence of air greatly reduces heat loss from the inside to the outside. This insulation works in both directions—preventing heat from escaping hot liquids and stopping heat from entering to keep cold liquids chilled.
• Reflective Coating: In some high-end vacuum flasks, the inner wall is coated with a reflective material (such as aluminum) that helps reflect radiant heat back into the liquid, further enhancing heat retention. Click and read more: How Do Insulated Bottles Cups Work?

1. Stainless Steel (18/8 or 304-Grade Stainless Steel)
This type of steel contains 18% chromium and 8% nickel, giving it superior corrosion resistance, durability, and safety for food and beverage storage.
• Corrosion Resistance: Stainless steel is highly resistant to rust and corrosion, even when exposed to moisture for extended periods, ensuring long-term use without degradation.
• Non-Reactive Surface: 18/8 stainless steel is a non-reactive metal, meaning it doesn’t impart flavors or leach harmful chemicals into the liquid, ensuring that beverages maintain their original taste.
• Durability and Impact Resistance: Stainless steel is known for its strength and durability, which makes it ideal for insulated bottles that are often used in outdoor and travel settings. The material can withstand drops, bumps, and everyday wear without denting easily.
2. Lid Materials: Food-Grade Plastics and Silicone
• Food-Safe Plastics (BPA-Free Polypropylene): It’s a highly durable and food-safe plastic that’s commonly used in the construction of bottle lids. It’s free from harmful chemicals like Bisphenol A (BPA), ensuring that no toxic substances leach into your drink. This material is chosen for its lightweight nature, impact resistance, and ease of molding into various lid designs, including flip lids, screw caps, and straw lids.
• Silicone Seals and Gaskets: Silicone is highly flexible, heat-resistant, and non-reactive, which makes it ideal for creating an airtight and watertight closure. These seals help prevent leaks and maintain temperature retention by minimizing heat exchange through the lid. Click and read more: Material Guide

1. Easy Cleaning
The larger opening allows for more accessible scrubbing, either with a sponge or bottle brush, ensuring thorough cleaning, especially in hard-to-reach areas. For those who prefer to use a dishwasher, wide mouth bottles are generally more compatible with dishwasher cleaning, as water and soap can circulate more easily inside the bottle.
Hygiene is a major concern for health-conscious individuals in the U.S., especially for reusable water bottles, which can harbor bacteria if not cleaned properly. The wide mouth design helps alleviate these concerns by making maintenance quick and effective.
2. Easy Ice Filling
In the U.S., many people enjoy cold beverages, especially during the warmer months. Wide mouth bottles make it significantly easier to add ice cubes compared to narrow mouth alternatives. The spacious opening accommodates standard and larger ice cubes without the need for breaking or crushing them, which is particularly convenient for users who want to keep their drinks cold for longer periods.
For insulated sport bottles, such as those designed by KingStar, adding ice helps maximize the insulation capabilities by maintaining a cooler internal temperature for hours, if not days. This makes wide mouth water bottles the perfect choice for athletes, outdoor enthusiasts, and anyone who enjoys their drinks ice-cold.
3. Usage Versatility
Beyond water, wide mouth sports bottles are ideal for thicker liquids like smoothies, protein shakes, and even soups, as the large opening allows for easier pouring and drinking of different types of beverages. This versatility makes them especially popular with fitness enthusiasts, office workers, and individuals who use their water bottles for both hydration and meal replacement shakes.
Additionally, the wider opening is useful for adding supplements, fruits, or other flavor-enhancing ingredients directly into the bottle. Consumers can easily toss in lemon slices, cucumber, or berries to create infused water, a growing trend among health-conscious U.S. consumers.