Glass insulated cups are designed to be odorless, non cross flavored, and free from heavy metal precipitation, making them suitable for beverages such as tea and coffee. Core purchasing principle，Identify high borosilicate double-layer glass, comply with safety regulations, use heavy-duty accessories, and do not blindly pursue appearance.
Core material: Only recognize this type to eliminate the risk of explosion
Required: High borosilicate heat-resistant glass
Resistant to temperatures ranging from -20 ℃ to 150 ℃, capable of sudden changes in temperature, not prone to explosion, and the material is stable and does not release harmful substances. Resolutely avoid，sodium calcium glass (severely affected by low-quality products)
The temperature difference resistance is only 50 ℃, and it is easy to explode when alternating between hot and cold. The cup body is turbid and thick, and there is no material labeling. It can only be filled with normal water and boiling water is prohibited.
Not recommended: Colored spray painted/printed glass
Printed on the inner wall and painted in full color, high temperature immersion can easily precipitate heavy metals, posing health hazards. Only choose styles with fully transparent inner walls and printed outer walls.
Structural technology: determines insulation, heat resistance, and durability
Double layered hollow structure (essential for glass insulated cups)
Double layered hollow core advantages: insulation, anti scalding, explosion proof, the outer wall of boiling water is not hot to the hand, and it can retain warm water for a long time in daily life.
Cup body craftsmanship details
High quality: uniform cup wall, no bubbles or impurities, round and smooth cup mouth, easy to clean without scaling.
Poor quality: The cup body has bubbles, rough edges on the cup mouth, and is prone to accumulating dirt and grime. Uneven heating can easily cause it to explode.
Cup Lid&Seals&Accessories: Deciding Leak Prevention and Safety
Cup lid material
Preferred: Food grade PP, Tritan material, high temperature resistance, no odor, not easy to yellow and age.
Avoiding pitfalls: Poor quality recycled plastics are prone to emitting odors and releasing harmful substances at high temperatures.
Silicone sealing ring
Identify food grade liquid silicone: high temperature resistance, no mold, no odor, sealed and leak proof.
Avoiding pitfalls: Ordinary rubber rings are prone to mold, odor, aging, and leakage.
Selection of opening and closing methods
Lock bounce cover: one handed opening and closing, suitable for commuting and students, preventing accidental contact and water leakage
Threaded screw cap: fully sealed, suitable for car use, business trips, and outdoor activities
Dual drink option: straight drink+straw, anti choking, suitable for all scenarios
