How can I create etched designs on plastic cups?

To create etched designs on plastic cups, you can use a technique called acid etching. First, create a stencil of your design using adhesive vinyl or masking tape. Apply the stencil to the cup and then use an etching cream or solution to etch the design onto the plastic. Follow the instructions on the etching product carefully and make sure to wear protective gloves and eyewear. After the etching process is complete, carefully remove the stencil to reveal your design.