Origins

Glasslock was developed by Samkwang Glass Co., Ltd., one of the largest glass manufacturers in South Korea. The company traces its origins to 1967, when it began producing industrial and household glass products.

In the early 2000s, plastic food containers dominated the market. In response, Samkwang Glass invested several years in research to develop a healthier and more durable alternative using tempered glass. This effort resulted in the creation of Glasslock, which was officially launched in 2005, with its first commercial products released in 2006. The brand introduced one of the world’s first four-sided locking tempered glass food storage containers, combining an airtight seal with microwave-safe glass construction.2

The Glasslock brand is built upon four core principles:

• Food safety
• Health
• Sustainability
• Durability

The company promotes glass as a cleaner and more environmentally friendly alternative to plastic food containers. Its name reflects this dual focus:

• Glass — representing purity and transparency.
• Lock — symbolizing secure, airtight food preservation.

By encouraging the use of reusable glass storage containers, the brand emphasizes the reduction of plastic consumption.3

TEMPERMAX™ Glass

Glasslock utilizes a proprietary tempered glass manufacturing technology known as TEMPERMAX™. Compared to ordinary soda-lime glass, TEMPERMAX glass offers:

• Higher impact resistance
• Improved resistance to thermal shock
• Better durability for everyday kitchen use
• High transparency
• A non-porous surface that resists stains and odors

Unlike some competitors that use borosilicate glass, Glasslock primarily uses specially processed tempered soda-lime glass. This approach emphasizes recyclability while maintaining sufficient heat resistance for standard kitchen applications.4

Glasslock has expanded its portfolio well beyond basic food containers. Major product lines include:

Food Storage Containers

• Rectangular containers
• Square containers
• Round containers
• Oven-safe containers
• Meal prep containers
• Divided lunch boxes
• Freezer containers

Cookware

• Glass baking dishes
• Pots
• Frying pans
• Cookware accessories

Beverage Ware

• Glass bottles
• Tumblers
• Water pitchers
• Travel mugs

Tableware

• Serving dishes
• Plates
• Bowls

Baby Products

The Glasslock Baby line includes:

• Baby food containers
• Feeding bowls
• Baby tableware

Pet Products

The company also manufactures:

• Glass pet bowls
• Pet feeding accessories

These products are marketed under the broader SGC Solutions portfolio.5

All Glasslock products are manufactured in South Korea. The company operates large-scale facilities, including a major production complex in Nonsan that integrates:

• Glass melting
• Tempering
• Mold production
• Quality inspection
• Packaging

Maintaining domestic production in Korea is a central component of the brand’s quality positioning.6

Typical Glasslock containers feature:

• Four-sided locking lid
• Silicone gasket for airtight sealing
• BPA-free plastic lids
• Heat-resistant tempered glass
• Microwave safe (glass base only)
• Dishwasher safe
• Refrigerator safe
• Freezer safe
• Oven safe (glass container only; lids should not be used in the oven)

These features have made Glasslock a popular choice for meal preparation, storing leftovers, food preservation, and packing lunches.7

Following its launch, Glasslock expanded rapidly into international markets. According to company information:

• Products are available in more than 90 countries.
• The brand is widely distributed across North America, Europe, Asia, and the Middle East.
• Distribution channels include supermarkets, department stores, specialty kitchen retailers, and online marketplaces.
• Major international retail partners have included large chains such as Costco and Walmart in various markets.10

Glasslock has received numerous accolades recognizing product design, innovation, sustainability, and consumer trust. These include:

• Korea LOHAS Certification
• Red Dot Design Award
• iF Design Award
• Good Design Award
• First Brand Award (multiple consecutive years)
• Korea Brand Awards
• Consumer satisfaction and quality awards11

Glasslock promotes environmental responsibility by emphasizing:

• Reusable glass containers
• 100% recyclable glass
• Reduced reliance on disposable plastics
• Long product lifespan
• Food-safe materials

The company positions glass as a durable alternative capable of helping reduce single-use plastic waste.

Glasslock is widely recognized as:

• One of South Korea’s leading glass food storage brands.
• A major global supplier of tempered glass food containers.
• An established premium brand competing with international kitchenware manufacturers.

Its reputation is founded on Korean manufacturing standards, durable tempered glass technology, and effective airtight storage solutions.

Glasslock is owned by SGC Solutions Co., Ltd. The corporate evolution of the parent company includes:

• 1967 – Samkwang Glass founded.
• 2005 – Glasslock brand launched.
• 2013 – Company renamed Samkwang Glass.
• 2020 – Business reorganized as SGC Solutions Co., Ltd.

In addition to the Glasslock brand, SGC Solutions develops cookware, premium glassware, baby products, and lifestyle kitchen products.8

Glasslock played a significant role in popularizing tempered glass food storage containers as a viable alternative to plastic. By combining durable glass with airtight locking lids, the brand influenced consumer preferences toward reusable, food-safe kitchen storage solutions and established itself as one of South Korea’s most internationally recognized housewares brands.9

1. 글라스락 | 대한민국 1등 유리밀폐용기
2. Glasslock 格拉氏洛克 – 全球玻璃保鮮盒領導品牌 | 關於Glasslock
3. 삼광글라스 브랜드 글라스락
4. 글라스락 | 대한민국 1등 유리밀폐용기
5. Glasslock
6. 글라스락 | 대한민국 1등 유리밀폐용기
7. Glasslock 格拉氏洛克 – 玻璃保鮮盒全球領導品牌
8. Glasslock 格拉氏洛克 – 全球玻璃保鮮盒領導品牌 | 關於巧禮
9. Glasslock Europe
10. Glasslock
11. Glasslock