REDUCE Vacuum-Insulated Glass Tumbler 20oz — Extra-Wide Straw & Lid, Borosilicate

REDUCE Aspen is a 20oz vacuum-insulated borosilicate glass tumbler with a soft-sit base, interchangeable lid and extra-wide straw designed to keep cold drinks chilled up to 12 hours while protecting surfaces.

Made for people who want a healthier, reusable drinking cup without sacrificing convenience, the REDUCE Aspen combines temperature control, sustainable materials, and practical details. Its double-walled insulated sleeve surrounds a glass inner vessel to preserve beverage temperature, while a BPA-free lid and large-diameter straw make thick smoothies, iced coffee, and boba easy to enjoy. Thoughtful touches like the Soft Sit1trade; base and dishwasher-safe components keep everyday use simple and quiet.

How long will my drink stay cold in the REDUCE Aspen?

The Aspen uses a vacuum-insulated sleeve around a borosilicate glass insert to slow heat transfer, so cold drinks stay pleasantly chilled for extended periods. While results vary by ambient temperature and how often you open it, the design maintains cold beverages up to about 12 hours under normal conditions.

• Vacuum-insulated outer sleeve minimizes temperature exchange
• Borosilicate glass interior resists thermal shock and preserves flavor
• Secure lid reduces cooling loss from spills and air exchange

Can I drink thick smoothies or boba through the included straw?

Yes—the Aspen includes an extra-wide straw made to handle textured drinks like bubble tea and fruit smoothies without clogging. The larger diameter lets you sip thick ingredients comfortably while still fitting snugly in the lid to prevent spills.

• Wide straw diameter for tapioca pearls and blended textures
• Straw and lid designed to fit both glass and insulated sleeve
• BPA-free materials for safer, cleaner sips

Is the REDUCE Aspen fragile like other glass tumblers?

The glass used is durable borosilicate, which is more resistant to sudden temperature changes than ordinary glass. Additionally, the insulated sleeve provides protection against bumps and improves grip, while the Soft Sit1trade; base cushions impacts and prevents sliding on furniture.

• Borosilicate glass resists thermal stress better than standard glass
• Insulated sleeve shields the glass and fits cupholders
• Soft Sit base absorbs shock and prevents surface marks

How easy is the Aspen to clean and carry day-to-day?

The Aspen was engineered for practical care: the glass insert and lid are dishwasher-safe and the sleeve is removable for thorough cleaning. Its cupholder-friendly shape fits most vehicle holders, and the lid and straw are interchangeable between the glass and sleeve for flexible use.

• Dishwasher-safe glass insert and lid for easy cleaning
• Removable insulated sleeve for access to all parts
• Cupholder-friendly profile ideal for commuting and travel

Who is this for: The REDUCE Aspen 20oz tumbler suits commuters, students, and anyone who prefers glass for taste purity but needs the convenience of a reusable travel cup. It appeals to people who drink textured beverages like smoothies or boba, those who want a BPA-free option, and homeowners who value furniture protection and quiet use. If you want a visually clear drinking vessel with reliable insulation, spill control, and easy maintenance, the Aspen offers a balanced, sustainable choice.