Your Direct OEM/ODM Factory for Custom Water Bottles & Tumblers

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.

While the size of water bottles can vary significantly, the following are some of the most common capacities found on the market:
• 12 oz (355 mL): This smaller size is ideal for kids or for carrying lightweight, portable bottles in small bags. It is typically used for short excursions, where a large amount of water isn’t necessary. Some insulated water bottles of this size are great for keeping beverages like coffee hot for hours.
• 17 oz (500 mL): This is a popular size for many consumers who prefer a balance between portability and sufficient hydration. Many insulated bottles, including those designed for gym-goers or for everyday carry, fall within this range.
• 20 oz (600 mL): Slightly larger than the 17 oz bottle, this size offers more capacity without becoming too bulky. It’s a great option for those looking for a bit more hydration during workouts or daily activities.
• 24 oz (710 mL): This mid-sized option is favored by many for its ability to hold more water while still being easy to carry around. Bottles in this range are often used for hiking, fitness activities, and long commutes.
• 32 oz (1,000 mL or 1 liter): A 32 oz bottle is perfect for people who need to stay hydrated over long periods, such as during a workday or extended outdoor activity. It’s often chosen by athletes and fitness enthusiasts because of its larger capacity. Many insulated bottles of this size can keep water cold for up to 24 hours.
• 40 oz (1.2 liters): This larger size is ideal for those who want to carry a substantial amount of water or other beverages. It is often used for all-day hydration without the need for frequent refills and is popular in insulated bottles due to its ability to maintain beverage temperatures for long periods.
• 64 oz (1.9 liters): This extra-large size is often marketed as a “half-gallon” bottle and is typically used by athletes or those aiming for high hydration throughout the day. This size is also ideal for outdoor activities like camping or long hikes where access to water might be limited. Some brands also offer this size with handles to make it easier to carry.

A vacuum insulated water bottle is a specialized container typically crafted from stainless steel or ceramic, featuring a vacuum-sealed layer between double walls. Its tightly sealed cap prevents temperature exchange, allowing the vacuum insulation to significantly slow heat transfer—keeping hot liquids warm and cold beverages chilled for extended periods. This modern hydration solution evolved directly from traditional thermos technology, adapting the same scientific principle of vacuum isolation into portable, user-friendly bottle formats for everyday convenience.

The thermal retention capability of vacuum insulated water bottles stems from their vacuum-sealed layer, which significantly reduces heat transfer. While heat can still move via convection, conduction, and radiation even in a vacuum environment, the process occurs at a dramatically slower rate. This vacuum barrier primarily inhibits conductive heat flow but doesn’t eliminate it entirely. When the liquid inside is hotter than the ambient temperature, the system slows cooling; conversely, when the contents are colder, it delays warming. This dual-action mechanism enables vacuum insulated bottles to effectively maintain both hot and cold temperatures.

Understanding stainless steel differences is crucial for selecting quality insulated bottles. With over 150 stainless steel variants exhibiting distinct properties, NSF international standards mandate that food equipment must use either 200 or 300 series alloys.

① 200 Series
While NSF-certified as food-grade (e.g., 201/202 SS), 200-series steel contains high manganese and minimal nickel, increasing corrosion/rust susceptibility. Typically reserved for industrial applications rather than drinkware, this series offers lower corrosion resistance than premium alternatives. Its role in insulated bottles stems primarily from budget-friendly pricing.

② 300 Series
304 and 316 SS represent austenitic stainless steel - characterized by minimal food-contaminant migration, exceptional media corrosion resistance, and superior hygienic properties. Food-contact products require these alloys. While 304 SS (18/8) dominates daily-use items with proven acid/alkali resistance, 316 SS serves high-end applications like aerospace and food machinery due to enhanced purity and performance, commanding premium pricing.

Ultimately, 304 and 316 SS deliver optimal quality for food-grade water bottles. As professional manufacturers, WEVI's wholesale insulated bottles utilize 304/316/201 stainless steel - ensuring balanced material selection for diverse needs.

A well-known supplier in China, Wevi have rich experience in manufacturing drinkware and containers with custom shapes, caps, logo print, surface finish, packages, etc. We also design for our clients, many designs have registered patents by our clients.

# Size/Capacity: 14oz, 18oz, 24oz, 32oz, 40oz, 64oz,128 oz or other customized capacity.

# Multiple Replacement Caps/Lids: Straw Lid, Sports Lid, Handle Lid, Stainless Steel Cap, Spout Lid, Wooden Lid, Flip Lid, etc.

# Surface Finish: Spraying, Powder Coating, Gradient Ramp, 3D/4D/5D Sculpture, Water Transfer, Air Transfer, Heat Transfer, etc.

# Logo Printing: Silkscreen Print, Laser Engraved, Embossed Logo, Heat Transfer Print, 4D Print, Sublimation Transfer, etc.

# Packaging Box: Egg Crate, White Box, Custom Color Box, Cylinder Box, Display Box, etc.

Of course. We usually provide existing samples free of charge, but a small sample fee is charged for custom designs. The sample fee is refundable when the order reaches a certain quantity.

We usually ship samples via FedEx, UPS, etc. If you have a carrier account, you can use your account to ship; if not, you can pay the shipping fee via PayPal, and we will ship using our account.

It takes about 5-7 days to reach. If you want your own designs, it takes 8-10 days.

Of course, we are professional in OEM/ODM projects and we protect all the designs of every client, we will sign NDA if needed to ensure that we won’t send your artwork to any other clients and won’t sell your OEM items to anyone else. Any questions please send us your inquiry.