Hello Carol - sorry, difficult item to attribute or date, and I certainly can't offer anything worthwhile. Wasn't sure whether you really meant 'liqueur' (as in Cointreau) or simply liquor (as in booze)

Historically, 'liqueur' was certainly drunk from tallish, small bowled glasses, although your bowl may be a tad big for 'liqueur', possibly. The design of your glass is, as your probably know, copying the shape and decoration of Venetian (style) drinking glasses made in the C16 and C17 - possibly even Spanish. Your 'diagonal ribs' are a style referred to as 'wrythen', usually, and this again is a historical twist so to speak. The rough area underneath may be the sharp remains of where the pontil rod was broken away from the piece, and I suspect your particular glass may have been made up from several separate parts. I can't see too clearly, but the decoration doesn't look like prunts - which are usually roughly circular blobs, and possibly yours is simply applied trailing. None of which helps you, unfortunately. Can't see any wear to speak of, but difficult to assess when pieces sit on the out part of the foot only. Are there any nibbles/wear on the bowl rim??? If this were genuine C19, I'd be looking for dirt lodged in crevices of the design, and some reasonable wear on the foot - the odd seed or air bubbles possibly, but as an uneducated guess, I'd go for Continental (European), in view of the colour. But then again, this may have been made only 20 years ago as a tourist souvenir