A lamp, book and water competing for the same hand path.
Keep the drink in a clear reachable place, separate from lamp switches and cables.
Use the guides below to compare the resting surface, the fit of your exact drink, and the type of holder that matches the problem.
The interruption you know too well.
A searching hand catches the glass; water runs under the book and glasses beside the bed.
Trace the movement before choosing the holder
One scenario to check: A searching hand catches the glass; water runs under the book and glasses beside the bed. Notice what your hand was reaching for and what was beneath the container. A drink can be within reach yet still sit directly in the path of that repeated movement.
Choose the drink spot from your normal sleeping position. Keep the lamp switch, glasses and book out of the path your hand takes to the water. Test the setup with an empty container first. The entire base needs level support.
A sealed container addresses liquid escaping when tipped. A stable surface addresses support. Steadi widens the resting base of compatible drinkware; it does not replace either of those decisions. Check your exact drink fit, then use the guides below for the setup you have.