Sun's Tea double-wall borosilicate glass tumblers — Set of 2 20oz highball, insulated & condensation-free

These Sun's Tea 20oz double-wall borosilicate glass tumblers are insulated highball cups designed to keep beverages at their intended temperature while preventing condensation and delivering a hefty, premium feel.

Engineered from pure borosilicate glass, this two-piece set combines durable construction with everyday convenience. The 20-ounce capacity and tall highball silhouette suit a wide range of drinks — from carbonated beer and mixed cocktails to iced tea, lemonade, and smoothies. The double-wall build limits sweating on the exterior, reducing the need for coasters, and the pinhole-free manufacturing helps preserve long-term insulation performance.

How do these tumblers manage hot and cold drinks effectively?

The double-wall cavity creates an insulating air layer between inner and outer glass surfaces, slowing heat transfer. That means cold drinks stay cooler longer without forming exterior condensation and warm drinks remain comfortable to hold.

• 20 oz capacity suited to large servings and ice.
• Double-wall air gap reduces thermal transfer and condensation.
• Pinhole-free construction prevents moisture from entering the wall.

Are these tumblers durable enough for everyday use?

Made from real borosilicate glass, these tumblers are more resistant to thermal shock than standard soda-lime glass. They’re built to handle daily handling and have been impact-tested to ensure robust performance under normal conditions.

• Pure borosilicate material for improved strength.
• 12-inch freefall ice-ball impact tested for durability.
• Solid 1 lb weight for a sturdy, premium hand-feel.

How convenient are they for kitchen use and storage?

The tumblers are designed for modern kitchens: microwave-safe for reheating, dishwasher-safe for easy cleaning, and freezer-safe for cooling beverages or chilling glassware. A few simple handling precautions will extend life and preserve insulation effectiveness.

• Safe in microwave, dishwasher, and freezer according to manufacturer guidelines.
• Handy tall profile fits most refrigerator door shelves.
• Avoid dropping heavy metal utensils into the glass to prevent mechanical shock.

What size and shape should I expect for different drinks?

These tumblers measure approximately 7.3 inches tall and 3.2 inches wide, offering a highball shape that accommodates tall cocktails, beers with headroom, and smoothies with plenty of ice. The wide mouth also makes stirring and pouring simple.

• 7.3" height and 3.2" diameter for tall pours and ice.
• 20-ounce volume fits large servings and mixed drinks.
• Set of two for paired servings or rotating use when washing.

Who is this for: These Sun's Tea tumblers suit home bartenders, outdoor entertainers, and everyday households that want glassware combining insulation, a premium weight, and easy care. Choose this set if you prefer real borosilicate glass over plastic, need versatile drinkware for both hot and cold beverages, and value a condensation-free exterior and dishwasher-safe convenience. If you want a lighter or smaller cup, consider Sun's Tea 16 oz options instead.