PLONK Wine Club Coupon: Save $20 On All Father’s Day Wine Club Gifts! Last updated by Hello Subscription on June 7, 2018. Father's Day Deals & Gift Boxes / Subscription Box Coupons & Deals / Plonk Wine Club Coupons Hello Subscription may earn compensation via links in this post. Read the full disclosure Save for Later Notification For Father’s Day, Plonk Wine Club is offering $20 off on all Father’s Day Wine Club gifts! Use the coupon code DAD2018 to get the deal.