OLYCRAFT Phenolic Resin Bottle Caps 30pcs Multi‑Size Set for Lab

Description

Product Overview

The OLYCRAFT phenolic resin bottle caps are engineered to meet the demanding requirements of laboratory, kitchen, and craft environments. Each cap is molded from high‑grade phenolic resin, a material known for its chemical resistance, rigidity, and long‑term durability. The set includes thirty caps in five distinct sizes, providing a comprehensive solution for containers ranging from small vials to larger bottles. The inner diameters of 16.5 mm, 18 mm, 20 mm, 22 mm, and 26 mm ensure a snug fit for a wide variety of neck dimensions, while the outer heights of 21 mm to 31.5 mm give ample clearance for easy handling.
Package dimensions measure 7.13 × 4.53 × 1.22 inches and the total weight is only 4.2 ounces, making the set lightweight yet robust. The caps feature a precision‑engineered screw thread that creates a tight, leak‑proof seal without the need for additional gaskets. This design minimizes the risk of spillage and preserves the integrity of the contents, whether they are volatile chemicals, delicate cosmetics, or flavorful condiments.
The phenolic resin construction also offers resistance to common solvents, acids, and bases, ensuring that the caps will not degrade when exposed to harsh substances. All caps are free from BPA and other harmful additives, complying with safety standards for food‑grade and laboratory‑grade applications. The black coloration provides a professional appearance while also reducing light exposure that could affect light‑sensitive products.
With thirty caps supplied—six of each size—you have ample inventory to replace lost caps, stock up for high‑volume usage, or keep a spare set for emergency situations. The caps are easy to clean with warm soapy water and can be reused indefinitely, supporting sustainable practices and reducing waste.
Each OLYCRAFT cap is produced using injection molding technology that guarantees uniform wall thickness and precise thread geometry. The manufacturing line operates under ISO‑9001 quality‑management standards, and every batch undergoes dimensional inspection with calibrated micrometers to verify inner diameter, outer height, and thread pitch. Caps that fall outside the ±0.1 mm tolerance are automatically rejected, ensuring that every piece delivered to the customer meets the same high standard of fit and performance. This rigorous process also includes thermal cycling tests to confirm that the phenolic resin retains its shape and sealing capability after exposure to temperature fluctuations common in laboratory and field environments.
The phenolic resin used in these caps is fully recyclable and conforms to environmental regulations such as REACH and RoHS. By choosing a reusable cap system, users can significantly reduce the volume of single‑use plastic waste generated from disposable closures. The black coloration is achieved with a pigment that does not leach into the contents, preserving product purity while also providing UV protection that helps extend the shelf life of light‑sensitive liquids. OLYCRAFT’s commitment to sustainability is reflected in the minimal packaging design, which utilizes recycled cardboard and eliminates unnecessary plastic inserts.
All OLYCRAFT caps comply with international safety and quality standards, including ISO 9001, ISO 13485 for medical device components, and FDA‑recognized food‑contact material guidelines. Each batch undergoes batch‑level testing for tensile strength, compression set, and chemical compatibility with common solvents such as ethanol, isopropanol, and acetone. The results are documented in a certificate of analysis that accompanies every shipment, giving end‑users confidence that the caps meet rigorous performance criteria. This level of compliance is especially important for regulated industries where traceability and material certification are mandatory.
Customer feedback consistently highlights the caps’ ease of use and reliable sealing performance. Reviewers note that the caps fit securely on a wide range of bottle types without the need for forceful tightening, and that the phenolic resin feels sturdy yet smooth to the touch. Many users appreciate the clear size labeling on the packaging, which simplifies inventory management in busy laboratory environments. The positive ratings and repeat purchases underscore the product’s reputation as a trusted solution for both professional and hobbyist applications.

Usage

These caps excel in a variety of settings. In a laboratory, they secure reagent bottles, solvent containers, and sample vials, preventing evaporation and contamination. In a kitchen, they provide airtight sealing for spice jars, oil bottles, and homemade sauces, keeping flavors fresh and preventing leaks during transport. Artists and hobbyists appreciate the caps for storing paints, glues, and modeling compounds, where a reliable seal is essential for maintaining consistency. The caps are also suitable for personal care products such as shampoos, lotions, and essential oils, offering a professional finish for DIY cosmetics.
The set’s versatility makes it ideal for educational institutions, small businesses, and home users alike. Whether you are preparing a chemistry experiment, packaging a gift basket, or organizing a craft supply drawer, the OLYCRAFT caps provide a dependable closure solution that enhances safety and convenience. Because the caps are compatible with standard thread sizes, they can be used as replacements for many generic caps, extending the life of existing containers.
In medical and clinical settings, the caps are frequently used to seal vials containing reagents, antibiotics, and patient‑specific formulations. Their leak‑proof design prevents accidental exposure to hazardous substances and maintains the sterility of the contents until the point of use. The caps can also be employed in field hospitals or mobile clinics where reliable sealing is critical for medication stability under varying temperature conditions. For home users, the caps simplify the organization of pantry items, allowing for clear labeling and easy access while protecting spices and sauces from moisture and air.
Effective storage of the caps themselves is facilitated by the compact box included in the package, which features individual compartments for each size, preventing loss and making inventory checks quick. When arranging a workstation, placing the caps near the bottles they serve reduces the time spent searching for the correct size, enhancing workflow efficiency. For bulk operations, the caps can be pre‑installed on empty containers before filling, streamlining the packaging process and ensuring a consistent seal across all units.
In outdoor and travel scenarios, the caps provide a dependable seal that protects liquids from spillage and contamination caused by temperature swings and vibration. Campers and hikers can rely on the caps to keep sauces, oils, and electrolyte drinks secure in backpacks, while field researchers use them to store sample solutions in rugged conditions. The lightweight nature of the caps adds minimal weight to gear, and the black finish reduces glare, making them practical for use in bright sunlight or low‑light environments.
To keep the caps organized, store them in the original compartmentalized box or transfer them to a small drawer organizer with labeled sections for each size. This prevents mixing of sizes and makes it easy to locate the exact cap needed for a specific bottle. For long‑term storage, place the caps in a dry environment away from direct sunlight to avoid any potential degradation of the resin. Regularly inspect the threads for wear and replace any caps that show signs of damage to maintain optimal sealing performance.

Why Choose Us

Choosing OLYCRAFT means selecting a brand with a proven track record in laboratory and scientific supplies. Our caps are manufactured under strict quality‑control processes, ensuring each piece meets dimensional tolerances within ±0.1 mm.
The phenolic resin material is sourced from reputable suppliers and undergoes rigorous testing for chemical compatibility, impact resistance, and thermal stability. Customer satisfaction is reinforced by a responsive support team that assists with fit verification, bulk ordering, and any technical inquiries.
We provide a hassle‑free return policy for defective items, reflecting our confidence in product durability. Additionally, the packaging is designed for easy inventory management, with clear labeling of size distribution and a compact box that fits comfortably on standard shelves.
OLYCRAFT invests heavily in research and development to continuously improve cap performance. Our engineering team collaborates with chemists and material scientists to test new resin formulations that offer higher resistance to aggressive solvents while maintaining flexibility for easy threading. This commitment to innovation has resulted in caps that outperform many generic alternatives in durability tests, such as impact resistance and long‑term compression set, providing users with a product that stands the test of time.
With a global distribution network, OLYCRAFT ensures fast and reliable delivery to customers across North America, Europe, and Asia. Our logistics partners use eco‑friendly packaging materials and optimize shipping routes to minimize carbon footprint. Customers benefit from transparent tracking, and any issues are addressed promptly by our multilingual support staff, who are trained to provide technical guidance and after‑sales assistance tailored to each market’s regulatory requirements.
OLYCRAFT stands behind its products with a one‑year limited warranty that covers manufacturing defects and material failures. Should a cap fail to meet the advertised performance standards, customers can contact our support team to arrange a replacement or refund. Our after‑sales service includes detailed installation guides, troubleshooting tips, and access to a knowledge base that addresses common issues such as thread compatibility and sealing techniques. This comprehensive support framework ensures that buyers receive lasting value and confidence throughout the product’s lifecycle.

Key Features

• Thirty caps in five sizes give you the flexibility to seal a wide range of bottle necks.
• High‑grade phenolic resin provides chemical resistance and long‑lasting durability.
• Precision screw thread creates a tight, leak‑proof seal without extra gaskets.
• Easy to clean and reuse, supporting sustainable and cost‑effective practices.
• Responsive customer support and hassle‑free returns ensure confidence in every purchase.

FAQ

What materials are the caps made from?

The caps are molded from high‑quality phenolic resin, a thermosetting plastic known for its excellent chemical resistance, rigidity, and long‑term durability. This material tolerates acids, bases, solvents, and temperature variations, making the caps suitable for both laboratory environments and everyday kitchen applications where safety and reliability are essential.

Are these caps compatible with standard bottle threads?

Yes, the caps are engineered to match the most common thread standards used on reagent bottles, condiment containers, and craft supply bottles. Their dimensions have been calibrated to provide a secure fit on standard 16‑26 mm inner diameters, allowing them to serve as direct replacements for a wide range of existing caps without the need for adapters.

Can the caps be sterilized for reuse?

Absolutely. The caps can be thoroughly cleaned with warm soapy water and, when required, sterilized using standard autoclave cycles or chemical disinfectants such as ethanol or bleach solutions. The phenolic resin maintains its structural integrity and sealing performance after repeated sterilization, allowing you to reuse the caps safely in demanding environments.

Do you offer bulk pricing for larger orders?

We provide tiered pricing structures for bulk purchases, allowing you to benefit from cost savings as order quantities increase. In addition, we can accommodate custom packaging, labeling, and shipping arrangements to meet specific business needs. To discuss pricing details or request a personalized quote, please reach out to our dedicated sales team.

How do I determine the correct cap size for my bottle?

To select the appropriate cap, first measure the inner diameter of the bottle’s neck using a caliper or a simple ruler. The measurement should be taken at the narrowest point where the cap will sit. Compare this value with the cap’s inner diameter specifications: 16.5 mm, 18 mm, 20 mm, 22 mm, and 26 mm. Choose the cap whose inner diameter is equal to or slightly larger than the bottle’s measurement to ensure a snug fit without excessive force. Additionally, verify the thread pitch by aligning the cap’s threads with the bottle’s threads; they should interlock smoothly. If the bottle has a non‑standard thread, the flexible phenolic resin can accommodate minor variations, but for best results, match the listed sizes. When in doubt, start with the next larger size and test the seal before final use.

Final Thoughts

Overall, the OLYCRAFT phenolic resin bottle caps deliver a combination of durability, versatility, and ease of use that makes them an essential accessory for professionals and hobbyists alike. By choosing this 30‑piece multi‑size set, you invest in a reliable sealing solution that reduces waste, simplifies inventory management, and enhances the safety of your stored liquids. Experience the confidence of a secure closure with every application.