Single-use means single
Sugar packets are commonly seen in eateries, tea rooms, coffee shops, and businesses. One serving of sweetener is ideal for this delivery method. They’re more sanitary than sugar dispensers since there are no spills, and they allow you to regulate portions.
However, some people are unaware of what single-use entails. Or perhaps they understand precisely what it means, but they merely want to agitate their coworkers, especially those they don’t like. Even if you can’t finish the entire packet, you’ll toss it out rather than put it in the pantry.