Which Cup Will Fill First? The Lipton Tea Pot Puzzle Solved

Physics-based maze puzzles and liquid flow teasers are continuous engagement drivers across social media. They test your visual observation skills by asking you to trace a path of flowing tea through a complex system of branching pipes—where hidden blockages and closed ends are cleverly placed to trick the eye.

A widely shared visual puzzle shows a Lipton teapot pouring tea down a central vertical pipe above seven numbered tea cups:

“Which cup will fill first?”

While the puzzle seems like a race between seven possible destinations (numbered 1 through 7), careful inspection reveals that almost every path contains a structural blockage.

In this guide, we trace every single branch from top to bottom, identify the blocked pipes, and reveal the only cup that actually receives liquid.

Deconstructing the Network: Pipe-by-Pipe Tracing

To find the correct solution, we follow the main central stream down from the top entry point and evaluate each branching pipe:

                    [ MAIN VERTICAL STREAM ]
                               |
      -------------------------------------------------------------
     |          |                  |                 |             |
 [ TO CUP 1 ] [ TO CUP 7 ]    [ TO CUP 6 ]      [ TO CUP 2/3 ] [ TO CUP 4/5 ]
 • Right top  • Left branch   • Lower left      • Lower right  • Bottom center
 • Blocked    • Blocked       • Open & Clear!   • Blocked      • Blocked

1. The Right Branch (To Cup 1)

• Path: The first branch to the right near the top leads to Cup 1.

• Status: BLOCKED. The end of the pipe just above Cup 1 is completely closed off.

2. The Upper Left Branch (To Cup 7)

• Path: Further down, a long branch splits off to the left towards Cup 7.

• Status: BLOCKED. The line is blocked near the middle elbow turn.

3. The Lower Left Branch (To Cup 6)

• Path: Continuing down the main vertical shaft, a branch turns left towards Cup 6.

• Status: OPEN. The pipe line is completely clear from the main stem all the way into Cup 6.

4. The Lower Right Branches (To Cups 2 and 3)

• Path: Branches leading off to the right towards Cup 2 and Cup 3.

• Status: BLOCKED. The line to Cup 2 is closed at the entrance, and the line to Cup 3 is blocked near the bottom end.

5. The Central Bottom Base (To Cups 4 and 5)

• Path: The very bottom of the central pipe connects down toward Cup 4 and Cup 5.

• Status: BLOCKED. The bottom spout is capped at the horizontal connection above Cup 5, and the entrance to Cup 4 is sealed closed.

Complete Path Status Table

The Answer

The only cup that will fill (and therefore fills first) is Cup 3 if you look closely at some variants, but in this specific graphic:

Let’s re-verify:

• Line to 1: Closed at bottom.

• Line to 2: Closed at entrance.

• Line to 3: Blocked along the lower bend.

• Line to 4: Blocked right before the cup.

• Line to 5: Blocked at the junction.

• Line to 6: Wait, let’s look at 3 vs 6.

• Looking closely at the image provided:

  • Branch to 7: Blocked at the vertical main pipe gap? No, the vertical pipe has a wall right after branch to 7? Let’s trace carefully:

  • Main pipe from top: goes down. First right goes to 1 (blocked at cup 1).

  • Main pipe continues down. On the left, branch goes to 7. But wait, the vertical pipe is blocked right below the branch to 1? No, there is a line blocking the main pipe below branch to 1?

  • Let’s look closely at the main vertical pipe:

    • Below top right branch (to 1): Main pipe continues.

    • Below left branch (to 7): Main pipe has a vertical line crossing it! Ah, let’s check where the gaps are.

    • Let’s trace from teapot down:

      • Main pipe goes down.

      • First right branch (to 1): Blocked at the very end above 1.

      • Left branch (to 7): Blocked at the start/middle.

      • Main vertical line has a blockage just above the branch to 6? No, the vertical line continues.

      • Branch to 6: Open!

      • Wait, let’s trace to 3: Is 3 open? No, blocked.

      • Cup 6 has a completely open, unbroken path from the teapot down through the main shaft and left into cup 6!

Therefore, the correct answer is Cup 6.

Why Most People Get It Wrong

1. Assuming All Pipes Are Open: Viewers often assume it’s a speed test based on pipe length or elevation, assuming liquid flows to the lowest/closest cup first.

2. Missing Subtle Line Closures: The image uses small black lines to cap or seal off pipe openings. Without zooming in, these blockages easily blend into the pipe outlines.

Conclusion

The answer to “Which cup will fill first?” is Cup 6—it is the only cup connected to an unblocked, open pipe line!

Frequently Asked Questions (FAQ)

What is the correct answer to the Lipton tea cup puzzle?

The correct answer is Cup 6.

Will any other cups fill up after Cup 6?

No. Because all other pipe branches contain permanent line blockages, no tea can reach any of the remaining cups even after Cup 6 overflows.