The short answer: no
A drip coffee bag is single-use — you get one cup per bag. By the time the first cup has brewed, the water has already pulled out most of the soluble flavor, sugars, and caffeine. Running water through the same grounds a second time gives you a thin, papery, and often bitter cup that isn't worth drinking.
Think of it like a tea bag: the second steep is a shadow of the first, and with coffee the drop-off is even steeper.
What actually happens on the second pour
Brewing extracts coffee in a rough order — pleasant acids and sugars first, harsher compounds last. A single 150 ml pour through a 10 g bag already reaches a balanced extraction. On a second pour:
• Most of the good flavor is gone — the grounds are largely spent, so the cup is weak and watery.
• What's left leans bitter — you're pulling the tail-end, over-extracted compounds without the sweetness to balance them.
• Caffeine drops sharply too, so it isn't even a good way to stay awake.
The result is the worst of both worlds: weak *and* bitter.
How to get more coffee from one bag (the right way)
If you're trying to reuse a bag because one cup feels too small, the fix isn't a second pour — it's using the bag correctly the first time:
• Want a bigger cup? Don't stretch one bag thin. Use two bags for a large mug — see drip bags for a large mug.
• Want it stronger? Use *less* water on a fresh bag (around 130 ml), not more water on a spent one. The drip bag calculator shows the exact amount.
• Making two cups? Use one fresh bag per cup — see drip bag coffee for two.
What to do with a used bag
Once you've brewed, lift the bag out and toss it. Most drip bags are paper filter plus grounds, so the spent bag is often compostable — a small green bonus over plastic pods (see drip bags vs pods). Used grounds are also handy in the garden as a soil amendment.