Strata Cups

Sean Roberts created a technique from scratch to make these one-of-a-kind porcelain tumblers.
created by

Sean Forest Roberts


Sean Forest Roberts created by

Sean Forest Roberts

read more about the maker

New Wave

Each of these handmade tumblers from ceramicist Sean Forest Roberts is a one-of-a-kind work of art. The vibrant, marbled pattern comes from a technique Sean took six years to develop from scratch. He began with a single tumbler thrown on his wheel, which turned into a plaster mold. Using a kind of liquid porcelain in this mold, Sean can create the vibrant, stratified bands of color in these drinking glasses. The unique swirl pattern on each cup is a beautiful blend of human ingenuity and nature's spontaneity. The color won"t fade in the dishwasher or microwave, or stain from coffee, tea, or wine. Handmade in Orcas Island, Washington.

Due to the handmade nature of this item, each is unique and will vary.

Sold individually.


Made in Washington

Sean Forest Roberts

created by

Sean Forest Roberts



With a background in chemistry, it’s no surprise Sean Forest Roberts brings a love of experimentation to his work in the ceramics studio. He is constantly developing new tools or techniques that allow him to develop forms and styles seen nowhere else— including one for making marbled porcelain that took him six years to develop from scratch. He was drawn to it by “the underlying randomness in the patterns and structures of nature,” but to the layman, that simply means his creations are uniquely beautiful.

Handmade Made in the USA
Made from
3" diameter x 3.5" H; 10 fl. oz. capacity
Microwave and dishwasher safe
Item ID

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Most of our items are in stock and will ship quickly. Orders for in-stock items placed before 5pm ET Monday through Friday, excluding Federal holidays, will ship in the US:
Economy shipping:
within 8 days, arriving no later than the 9th business day after the order was placed.
Standard shipping:
within 4 days, arriving 5 business days after the order was placed.
Preferred shipping:
within 2 days, arriving 3 business days after the order was placed.
Expedited shipping:
within 1 day, arriving 2 business days after the order was placed.
Express shipping:
will ship the same day and arrive 1 business day later.

Please note: This item is not available to ship outside of the U.S.

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