Zmkvn Nine Ounce Square Outer Double Wall Borosilicate Tumbler Clear

Overview

One handleless clear double-wall borosilicate tumbler with a square outer wall and chamfered vertical corners surrounding one round suspended inner chamber.

Specifications

• Vessel quantity: exactly 1
• Material: clear borosilicate glass
• Construction: sealed double-wall body
• Usable capacity: approximately 9 US fl oz (266 mL)
• Overall height: approximately 9 cm
• Outer width and depth: approximately 8.5 cm x 8.5 cm
• Outer profile: square with exactly 4 flat faces and 4 chamfered vertical corners
• Inner chamber: one centered cylindrical chamber with a rounded lower bowl
• Rim: round drinking opening within a square outer shoulder
• Handle: none
• Base: flat square outer base with rounded corner pads formed in the glass
• Base gap: visible air space below the rounded inner chamber
• Maker vent: one small sealed circular manufacturing mark under the square outer base
• Printed design, lid, straw, spoon, saucer, coaster, and rack: not included
• Product Net Weight: approximately 0.22 kg

Features

• A round drinking chamber remains centered within the square transparent outer body.
• Four chamfered corners soften the transition between the flat outer faces.
• No vacuum-insulation, condensation-free, burn-prevention, temperature-retention, or temperature-rating claim is made.

Package Includes

• 1 clear 9-ounce square-outer double-wall borosilicate tumbler
• 1 printed use-and-care card

Use and Care

Grip the body with clean, dry hands and place all four base corners on a stable level surface. Do not twist the round rim against another vessel or use the chamfered corners to strike ice or hard objects. Wash and dry before first use. Inspect both walls, the rim junction, base, handle joins when present, and the small sealed maker vent mark before every use. Do not use glassware with a chip, crack, loose handle, open vent, trapped liquid between walls, or sharp edge. Avoid impact and sudden temperature changes; do not move directly between very hot and very cold conditions. Fill on a stable surface, leave headspace, and test beverage temperature carefully before drinking. Hand wash with mild detergent and a nonabrasive sponge, rinse, and dry fully. Do not insert tools between walls. No claim is made for microwave, oven, freezer, stovetop, or dishwasher compatibility.