High confidence
Exact registry match — this is a specific TTB COLA record. We found a strong match for this wine.
What to Expect
Relentless is a dessert-style wine crafted from Syrah and Petite Sirah grapes, both grown in the sunny vineyards of California. This versatile wine offers a rich, full-bodied experience suitable for both special occasions and everyday cooking, thanks to its deep color and robust tannins with long ageing potential. Whether you're looking for a sweet finish or something more savory, Relentless caters to your palate's diverse preferences in this delectable dessert/Port/Sherry/Cooking wine category.
Original editorial summary © 2026 Encyclopedia of Wine. All rights reserved; may not be reproduced without permission. Registry facts are public TTB data; brand names and label artwork remain the property of their respective producers.
| TTB ID | 23207001000850 |
|---|---|
| Brand name | RELENTLESS |
| Class / type | — |
| Origin / appellation | — |
| Grape varietals | Syrah, Petite Sirah |
| Approval date | Jul 28, 2023 |
| Status | APPROVED |
| Serial number | 23ELIA |
| Permit number | BW-CA-4897 |
| Producer name & address | SHAFER VINEYARDS 6154 SILVERADO TRL NAPA CA 94558 |
| TTB record | View on TTB COLA Online → |
Official Source
TTB remains the source of record. Wine Grabber links each record back to the public COLA detail when available.
View official TTB record → Related Registry Pages
What would you like to do next?
Wine Grabber is a free public registry. Pick the path that fits you — your choice helps us learn what people come here for.
For wine drinkers
Understand & remember this wine
Scan, understand, save, and learn about this wine.
For wine businesses
Manage & monetize this wine data
Turn labels into clean product records, menus, shelf cards, ecommerce copy, and inventory-ready wine data.
Data sourced from the public TTB COLA Online registry. Wine Grabber is not affiliated with or endorsed by TTB.
Label images are being added for a growing share of records as we harvest them from TTB. Coverage is partial and growing. Coverage & Limitations →