A lug closure (10) includes a central top panel (20), an annular channel (30) outboard of the top panel, a downwardly extending skirt (50) outboard of the channel, the skirt terminating at an inward curl (54) that defines a curl height, and lugs (60) formed in the curl. Each one of the lugs includes a body that extends radially inwardly from the skirt. The body includes a leading edge (70a) that merges into a leading portion (80a) of the curl. The leading edge tapers in thickness from the curl height to a minimum lug thickness and forms a leading edge vertical taper angle from horizontal between 6 and 15 degrees. A trailing edge (70b) merges into a trailing portion (80b) of the curl and the trailing edge (70b) tapers in thickness from the curl height to the minimum lug thickness.