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how many holes does a straw have

A straw has one continuous hole, but people argue for one, two, or even zero depending on how they define “hole,” which is why this stays such a fun debate.

How Many Holes Does a Straw Have?

Quick Scoop

If you line up the main viewpoints, you get three serious contenders:

  1. One-hole view (the topology / math answer)
    • A straw is like a tunnel: one continuous passage from one end to the other.
 * In topology (a branch of math that studies shapes up to stretching and bending), a straw is modeled as a cylinder that is the product of a circle and a line segment. That shape has one “through” hole, not two.

 * An everyday analogy:
   * A tunnel through a mountain doesn’t have “two holes,” it’s one tunnel with two openings.
   * Same idea for a straw: one hole, two openings.
  1. Two-holes view (the intuitive / everyday answer)
    • Many people look at the two open ends and say: two circular openings = two holes.
 * In casual language, we often call each opening a “hole” (e.g., “two holes in this box” if it has two cut-out circles).
 * From this perspective, you can say: there’s one hole where liquid goes in, another where it comes out, so “two holes” feels natural.
  1. Zero-holes view (the philosophical twist)
    • A minority argument claims a straw is just a rolled-up sheet with no true “holes” in the material itself.
 * If you think “holes” must be punctures _through_ a surface, they’d say the surface of the straw is unbroken, so technically zero holes.

 * This view usually comes up in deeper philosophy-of-language or “what is a hole really?” discussions rather than in practical talk.

Why Mathematicians Say “One Hole”

The more formal, “correct” answer in math and engineering tends to be one hole.

  • In topology:
    • A straw is treated as a hollow cylinder (a circle stretched along a line).
    • That object has one continuous tunnel-like hole.
  • In engineering:
    • If a passage goes all the way through, it’s a through-hole.
    • If it stops partway, it’s a blind hole.
    • Either way, each continuous passage counts as one hole, whether or not both ends are open.

A neat way to picture this comes from a classic thought experiment:

  • Imagine cutting the straw along its length and unfolding it into a flat sheet.
  • You can only do that once without splitting it into multiple pieces, which corresponds to there being one hole.

Forum Discussion & Trending Context

This question shows up again and again in online debates, Q&A videos, and forums, because it sits at the crossroads of:

  • everyday intuition,
  • mathematical definitions, and
  • philosophical nitpicking about language.

Recent and long-running discussions often include:

  • Polls where people vote “1 hole” vs “2 holes,” sometimes split surprisingly evenly.
  • Data-visualization posts and comment threads arguing whether we should think “topologically or colloquially.”
  • Video explainers from educators and science channels using the straw to introduce basic topology.

A typical comment-summary from forums:

“Mathematically speaking it's one hole, from a practicality standpoint it's two holes. It really depends on the context or why you are asking the question.”

So as of the last few years, the “one-hole” answer is the favorite in math/science explanations, while casual conversations keep the argument alive as a light, viral topic.

Different Viewpoints at a Glance (HTML Table)

[9][1] [7][1][9] [1][3][9] [1][5] [5][1] [8][7][5] [1][5] [5][1] [1][5]
Viewpoint Claim Main Reasoning Who Typically Uses It
Topological / mathematical A straw has one hole. One continuous tunnel (product of a circle and an interval), like a single tunnel with two openings. Mathematicians, science explainers, some engineers.
Colloquial “two ends” view A straw has two holes. Each circular opening is counted as a separate hole; “two ends, two holes.” Everyday conversation, forum debates, casual polls.
Philosophical “zero hole” view A straw has zero holes. The surface is unbroken; the “hole” idea is questioned or reserved for punctures in material. Edge-case philosophical or playful arguments in discussions.

Story-style Example to Picture It

Imagine you’re digging through a hill with a shovel.

  • You dig from one side, your friend digs from the other, and eventually the tunnels meet.
  • The villagers argue in the pub later:
    • One group says, “That hill now has one tunnel.”
    • Another says, “You dug two holes that happened to connect.”
  • A visiting mathematician smiles and says, “In my language, that’s one hole with two openings,” orders a drink, and the argument continues anyway.

A straw is the drink-version of that hill: one continuous hollow tunnel; how many “holes” you say it has depends on which language game you’re playing. TL;DR:
If you go by math and engineering, a straw has one hole (a single continuous tunnel with two openings).

If you go by everyday speech, many people are happy to say it has two holes , and a few even argue for zero —which is exactly why this question keeps trending in forums and videos.

Information gathered from public forums or data available on the internet and portrayed here.