Non leak cups

Can anyone recommend a non drip drinking cup that is actually non drip even when left on its side?

My mother is in a nursing home and can use their cups with or without spouts when supervised.
The problem comes when she has a drink from the bedside table unsupervised it ends up soaking everywhere.

From the adult cups I've viewed online, non claim to be leak proof just spill proof. Is a toddler cup the way forward? Not very visually appropriate I know!