Every time you get a coffee drink from the coffee house, or a boba or tea from a tea house, They give it to you in a disposable cup. When you're done drinking it.... the cup goes in the trash... That cup is referred to as a "Single Use Plastic". Stroba is NOT a single use plastic. Yes, it still has plastic in the design, however it's made from durable Polypropylene material that is re-usable meaning you buy it once and it lasts you a long time. This cuts down on throwing away plastic products unnecessarily.