That’s a classic “life hack” headline, but there’s no real special reason or scientific benefit to leaving an upturned glass and a piece of paper in the sink before going on vacation.
🚰 What the claim usually tries to suggest
These posts typically imply things like:
- Preventing bad smells from drains
- Blocking pests
- Keeping the sink “sealed” magically
But none of that requires a glass-and-paper trick.
🧠 What actually matters before leaving a sink unused
🚿 1. Drying out odor traps (real issue)
Sink smells come from the P-trap (water seal in plumbing) drying out, especially in hot weather.
Better solution:
- Pour a little water down all drains before leaving
- Add a tablespoon of cooking oil on top (slows evaporation)
🦟 2. Preventing insects
Flies can sometimes come from drains.
Better solution:
- Clean the drain
- Use boiling water or mild vinegar solution
- Keep kitchen clean of food residue
🚪 3. Preventing general household smells
- Empty trash
- Clean sink and counters
- Run water briefly in all drains
❌ What the “glass and paper” trick does NOT do
- It does not seal the drain
- It does not prevent evaporation meaningfully
- It does not block pests
- It has no plumbing function
It’s just a visual trick that went viral online.
🧠 Bottom line
Leaving an upturned glass and paper in the sink is not a real maintenance method. Proper drain care (water, cleaning, and hygiene) is what actually prevents problems while you’re away.
If you want, I can give you a simple pre-vacation home checklist (kitchen, bathroom, fridge, plumbing) that actually prevents smells, leaks, and pests.

