Libbey Cobalt Blue Mid-Century Modern Ribbed Juice Glasses (Set of 6)
Libbey Glass Company · Kitchenware > Drinkware
Era / Decade
1960s-1970s. The shape and ribbing are classic MCM era trends; similar styles were part of the 'Crisp' or 'Optic' lines.
Material
Pressed Cobalt Blue Glass. The color is deep and consistent, indicating high-quality mass-produced vintage glassware.
Condition
Excellent. No visible chips, cracks, or clouding (dishwasher film). The rims appear smooth and the ribbing is sharp.
Demand Level
Strong. Cobalt blue glassware has a dedicated collector base and fits the currently trending 'Grandmillennial' and MCM decor styles.
Resale Value
Estimated Resale Value
$35.00 - $55.00 for the full set of six.
Estimated Retail Value
$45.00 - $60.00 (comparable new high-end artisan glassware sets)
Comparable Sales
Recent sets of 4-6 ribbed cobalt juice glasses have sold between $30 and $58 on eBay and Etsy plus shipping.
Description
Set of 6 vintage cobalt blue juice tumblers featuring a bulbous bottom and slightly flared rim. These glasses boast a tight vertical ribbed (optic) texture that provides an excellent grip and a beautiful play of light. Deep vivid blue color throughout. Approximately 3.5 to 4 inches tall.
Key Features
Highly collectible cobalt blue color; complete set of six (harder to find than singles); Mid-Century Modern aesthetic; tactile ribbed texture.
Authenticity Indicators
Libbey often used an 'L' mark on the bottom, though many vintage pieces remained unmarked. The weight and mold quality are consistent with mid-market American glass makers. Confidence: High.
Flaws to Note
Look for 'flea bites' (tiny nicks) on the inner rims. Check for 'dishwasher rot' (white hazy film) which is permanent glass damage and significantly reduces value.
Selling Guide
Where to Sell
Etsy is the best platform for vintage glass buyers. eBay is a close second. Facebook Marketplace is good for a quick local sale without shipping risks.
Selling Tips
Use keywords: 'Cobalt Blue', 'Ribbed', 'Optic', 'MCM', 'Juice Glasses'. Photograph them with backlight to show the transparency of the blue. Double-box these for shipping—vintage glass is brittle.