Facing that problem right now. I'm usually a big drinker, always the first to start, usually around mid arvo ha ha.
Have DH drinking from my glass at every opportunity, then mixing wine with sparkling water and ice and telling everyone I'm doing it to avoid a hangover. If I get poured too much straight up then I've carried my glass with me to the kitchen/outside/anyway and ditched half of it. Such a waste!