Taiwan manufacturing is still the best in the world in various categories. We all know about semiconductors. Most of us know about bikes. But I wouldn't have guessed they'd be the king of the hill at plastic glassware.
Bellaforte Acrylic Drinking Tumblers
From what I can tell, Bellaforte plastic "glasses" are made in Taiwan from acrylic sourced from the USA. They've become my favorite glass to drink water, juice, and soda from. They really do look like crystal, and they have a heft to them that's not as heavy as glass, but much thicker and more sturdy that what you'd think a plastic cup would feel like. Even after going through the dishwasher dozens of times, they still look clear as glass every time. These are large sized glasses, about the size of a pint glass.
bzyoo 14oz Liberty Short Tumbler Set
Bzyoo is a Taiwanese company that sells directly to consumers. These are smaller tumblers that hold 14oz, so they're good for cocktails or cold sodas. They're also made in Taiwan using Tritan acrylic from the USA, but their design is patented. The result is a near seamless tumbler that looks just like glass.
Lily's Home Unbreakable Premium Drinking Glasses
Lily's Home is a brand that appears to be out of Hong Kong, but they do make these in Taiwan as well. The quality isn't quite up to bzyoo, but if you're looking something that literally looks like crystal, these are virtually indistinguishable from a distance.
Spread the word about these acrylic "glassware". It's only a matter of time before China tries to flood the market and take over this market like they did so many others. The only way to prevent that is to support manufacturers who still take pride in craftsmanship and haven't turned over their IP to China to steal and destroy them like so many American companies have done.