It's not just any party cup; it's the king of the keggers. Born in the '70s, the ubiquitous red cup is the official drinking vessel at barbecues, fairs and college parties across America.

The classic red Solo cup—a keg party staple for nearly four decades—had switched from a round to a square bottom. ... It is hard to differentiate one red plastic cup from another. So, ...

The new cups will use 10-20% less plastic. ... including raised dots and letters embossed on the bottom to allow baristas and customers with low vision to identify sizes by touch.

In addition to using less plastic for the cups themselves — Starbucks projects the new cups will save more than 13.5 million pounds of plastic going to landfills annually — it is “projected ...

Starbucks says it will alleviate some of the waste from its iced drinks with new disposable cups that contain up to 20% less plastic.