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4 WINES&VINES April 2017 PUBLISHING INFORMATION: Volume 98 Number 4. Wines & Vines, ISSN 043-583X, a member of Wine Communications Group, Sonoma, Calif., is published monthly. Periodicals postage paid at San Rafael and at additional mailing offices. Reproduction in whole or part without permission is prohibited. Wines & Vines does not assume responsibility for unsolicited manuscripts or materials. Contributors are responsible for the proper release of proprietary and/or classified information. Wines & Vines is distributed through an audited circulation. SUBSCRIPTION RATES: U.S., $38; Canada/ Mexico, $48; All other countries, $85 (for airmail add $85). POSTMASTER: Send address changes to: Wines & Vines, PO Box 1649, Boulder, CO 80306-1649. 6 Connect With Us 8 Editor's Letter 78 Faces & Forums 82 Advertiser Index METRICS 10 DtC Takes Off as Over- all Sales Stay Strong. PRODUCTS 28 News Natural Closure Option. 68 Focus New Yeast Products. COLUMN 36 Viewpoint One Place, One Life. By Jim Law NEWS 13 Top Stories Grapegrowers Applaud WOTUS Rollback. 72 Eastern News Growers Hear Results of Frost Protection. BARRELS 38 Sweet Triterpenoids in Oak for Cooperage Uncovering the difference between sessile and pedunculate oak. Do both species exist in the same forest, and are their effects on wine the same? By Axel Marchal, Pierre Waffo-Teguo, Andrei Prida and Denis Dubourdieu 46 Replicating the Barrel with New Alternatives Suppliers expand range of shapes and sizes for oak barrel alternatives and offer new extracts for wine finishing. By Andrew Adams WINEMAKING 52 Technical Spotlight: Infinite Monkey Theorem Urban winery finds success in Denver with edgy branding and canned wines. Having expanded to Austin, company is eyeing other unconventional cities to open winery tap rooms. By Andrew Adams 60 The Benefits of Egg-Shaped Wine Tanks Winery trial compares half-ton bins and plastic eggs, discusses concrete and ceramic vessels of the same shape. By Richard Carey GRAPEGROWING 32 Production Costs for Alternative Winegrowing Farming Systems Column breaks down the differences between organic, Biodynamic and conventional grapegrowing, then looks at whether added costs are recouped by growers selling grapes. By Glenn McGourty 74 Grapegrowers Make Progress With Cold-Hardy Varieties Minnesota's Cold Climate Conference reflects growth of new wine regions, offers tasting of new grape varieties created to withstand extreme tem- peratures. By Bill Ward 46 52 38