The British Half Pint Beer Glass [Amazon] is the perfect all-purpose drinking glass, and a set of 12 should immediately replace all other small- to medium-sized glasses in your cupboards.
It's like a traditional nonik pint glass, complete with elegant bulge for gripping and safe stacking, but miniaturized to contain only half a pint. It's adorable and is the perfect measure for just about any drink other than weak beer: wine, mixed drinks and decent ale are only the beginning, as they're an excellent vessel for nonalcoholic beverages and even hot drinks. (The wide, accessible character makes them good for experimenting with cocktails, too.)
Since I got a set, they've become my daily driver for my favorite sawbuck reds, both expanding their influence on my palate even as they moderate my consumption. Yes, Orwell would be displeased, but such is life, and life is not much for the opinions of the dead.
There are a few cheaper sets you can find, but most are trash, either merch for Britishy franchises or cheap, thin glass that's liable to chip or crack quickly. Get the high-quality tempered-glass set here. You won't regret it.
British Half Pint Beer Glass [Amazon]