The short answer
Use a coaster or a small tray under drinks on a nightstand unless the maker's care instructions confirm the top is intended for direct contact with moisture and you accept the marks that follow. The condition is the finish: if it is unknown, unsealed or described only by a colour name, protect it first.
What to check before deciding
Which nightly nightstand routines put the finish most at risk?
The risk is highest when the top does two jobs at once. In a shared bedroom, one person sets down a water glass in the dark while the other keeps a lamp lit and a cable moving nearby. Condensation and small spills can sit unnoticed under the lamp base or beside a charger. If you want a rustic top to age with marks, or the maker says the surface is designed for direct use and you follow their instructions, you may skip the coaster. Even then, dry the glass base.
How should you check the nightstand finish before using a tray or cleaner?
Identify the material and finish before choosing a tray, pad or cleaner. Ask the seller or manufacturer for care instructions for that exact nightstand, including whether coasters or protective pads are recommended and which cleaning products are safe. Check the lamp base and tray edges for grit that could scratch, and lift items rather than sliding them while the finish is unconfirmed. If instructions are missing, use a coaster or tray as a low-risk barrier and leave polish off the surface.
A practical checklist
- Give the water glass one landing place, such as a tray with a lip, away from the lamp base and cable. Empty and dry it before bed.
- Ask for the care instructions and finish name in writing before using any cleaner. If the reply only repeats the colour, treat the surface as unconfirmed.
- Check the lamp base and coaster for rough edges or grit, and lift objects rather than sliding them when the finish is unknown.
These are general planning ideas. For an individual product, confirm its exact dimensions, care instructions and installation requirements.
Check the relevant collection or guide ↗