Multi-colored striped glass tumbler and matching plate

This set consists of a clear glass plate and an inverted tumbler, both featuring a series of concentric or horizontal multi-colored stripes. The color palette appears to include red, black, yellow, orange, and teal/green. The glass is transparent and exhibits a weighted base on the tumbler, which is currently resting upside down. The plate features a slightly raised or flared rim where the stripes are applied. The stripes appear to be applied to the exterior surface or fired into the glass, consistent with mid-to-late 20th-century decorative glassware styles. While the tumbler base appears to bear a purple or dark-colored mark or signature on its underside, the text is not clearly legible from this angle and orientation; it remains unverified and would require close-up physical inspection to determine a specific maker. The items show gloss and clarity consistent with well-maintained glassware, with no obvious chips or cracks visible in the provided image. The aesthetic is stylistically consistent with late 20th-century pop-art influenced kitchenware or designer glass sets such as those produced for retail in the 1980s or 1990s. The identification is hedged due to the illegibility of the maker's mark.

Based on my visual examination of the provided image, I have analyzed this two-piece glassware set consisting of a tumbler and a coordinating plate. From what I can see, the set features a vibrant, multi-colored striped motif that appears to be applied or fired onto the glass. Specifically, the aesthetic is highly characteristic of late 20th-century decorative glassware, likely from the 1980s or 1990s. While I can see a dark mark on the base of the tumbler, it is illegible in the photograph; therefore, I cannot verify the specific maker or designer from this perspective. I am treating the attribution to a specific high-end designer as a hypothesis only. This estimate is based on the assumption that the set is a production piece from a reputable retail designer of that era, such as those sold in boutique or high-end department stores. The value is driven by the current market interest in 'Postmodern' or 'Pop Art' influenced kitchenware. If the illegible mark were to be identified through physical inspection as a well-known studio glass artist, the value could increase. Conversely, if it is an unattributed mass-market piece, the value would likely fall into the $15.00 to $30.00 range. To confirm this valuation, an in-person examination is necessary to verify the mark under magnification, check for surface wear not visible in photos, and evaluate the glass quality. Stability in the market for this style depends heavily on brand recognition and the absence of any chips or fading in the pigments.