Retro Ribbed Glass Cup with Glass Straw & Lid
【About the Ribbed Glass Cup Set】Includes 1 glass cup with lid, 1 glass cup lid, and 1 thickened glass straw. Cup height: 5.39 inches/13.7 cm, rim diameter: 3.07 inches/7.8 cm, capacity: 13 oz/380 ml. Additional glass straw brushes can be added upon request, and custom full-set bubble wrap packaging boxes are available.
【Premium Glass Craftsmanship】The cup body and lid are crafted from lead-free soda-lime glass, while the straw is made of high borosilicate glass for exceptional durability. The cup's standard operating temperature range is -20°C to 120°C. Utilizing advanced glass techniques, the cup features tightly ordered textures and a stylish, elegant design. It not only meets daily drinking needs but also adds aesthetic appeal, enhancing the enjoyment of beverages in your life.
【Versatile Beverage Compatibility】This glass cup perfectly complements various beverages, suitable for both hot and cold drinks. It excels for enjoying iced coffee, fresh juices, cocktails, iced tea, sparkling drinks, and other summer beverages. Its stylish, elegant design paired with transparent glass beautifully showcases the vibrant, lively colors of your drinks.
【OEM Service Provider】Royaltop holds multiple certifications including FDA, ISO9001, and LFGB. We offer comprehensive customization services for cup color, shape, capacity, as well as logo and packaging. Our extensive range of home and kitchen glassware includes plates, bowls, cups, bottles, jars, and more.
Product Information
| Brand: | Royaltop | Product name: | Glass Tumbler |
| Use: | Glassware | Function: | Water, juice, cold drinks, coffee, and tea containers |
| Lid Material: | Glass | Bottle Material: | Glass |
| Straw Material: | Glass | Features: | Environmentally Friendly |
| Shape: | Round | Color: | Clear |
| Height: | 13.7cm | Capacity: | 380ml |
| Certificate: | LFGB, FDA, SGS, ISO | MOQ: | 5000pcs |
| OEM service: | Custom color, Logo, packaging | Delivery time: | 15 ~ 35 days |
Usage Guidelines for Sodium-Calcium Glassware:
Sodium-calcium glassware (the most common type of everyday glassware, such as standard drinking glasses and tableware cups) requires temperature considerations based on material properties and usage scenarios. The key is to avoid breakage caused by “sudden temperature changes.” Specific temperature ranges and precautions are as follows:
I. Core Usage Temperature Range
1. Standard Usage Temperature: -20°C to 120°C
This is the safest temperature range for sodium-calcium glass, covering everyday scenarios:
- Low end: Can briefly hold chilled beverages (e.g., 4°C ice water, refrigerated milk) or be placed in the refrigerator (avoid direct contact with inner walls to prevent localized rapid cooling).
High-Temperature End: Can hold warm or hot water (e.g., 80°C to 100°C boiling water), but note the **“preheating”** requirement (see precautions below). Never pour scalding liquids directly into the glass.
2. Maximum Temperature Tolerance (Not for Long-Term Use): Sodium-calcium glass has a softening point of approximately 600°C to 700°C. However, this refers to industrial processing temperatures. In daily use, never expose it to high heat sources (e.g., open flames, microwaves, ovens). Uneven heating can cause rapid breakage and pose safety risks.
II. Critical Usage Restrictions: Avoid Thermal Shock
The primary weakness of sodium-calcium glass is its inferior thermal stability (compared to borosilicate glass). When temperature differences exceed 50°C to 80°C across different parts of the vessel, uneven thermal expansion and contraction can cause shattering. Strictly avoid the following actions:
❌ Pouring 100°C boiling water directly into a cold cup that recently held ice water (around 0°C);
❌ Immediately rinsing a hot cup (used for porridge/soup over 90°C) with cold water or placing it in the refrigerator;
❌ Placing a cold cup directly on a hot stove or radiator to warm it;
❌ Heating it in a microwave (unless explicitly labeled “microwave-safe” on the base; most standard sodium-calcium cups are not microwave-safe).
III. Safety Usage Recommendations
1. Preheat before hot water: When filling with boiling water, first pour a small amount of warm water and swirl the cup to evenly heat the walls (10–20 seconds). Gradually add hot water to significantly reduce breakage risk.
2. Identify “Special-Treatment Sodium-Calcium Glass Cups”: Some brands subject sodium-calcium glass to “physical strengthening” (e.g., rapid cooling treatment) to enhance thermal stability. Such cups may be labeled “Heat Shock Resistance ≥100°C,” allowing broader usage. Always follow product instructions (treat as standard sodium-calcium glass if unlabeled).
3. Avoid prolonged exposure to extreme temperatures: While briefly holding ice water or hot water is acceptable, prolonged storage (e.g., over 24 hours) is not recommended. This prevents microscopic cracks from forming due to sustained thermal stress (invisible to the naked eye but prone to breakage later).
IV. Comparison with Borosilicate Glass (For clearer selection)
V. In summary, standard sodium-calcium glass cups are safe for daily use with “lukewarm water, hot water (requires preheating), and ice water.” The key is to avoid “sudden temperature changes” and “direct high-heat sources.” Proper usage according to the scenario will extend the product's lifespan.
