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ThinkGeek Holiday Giftcade

FREE SHIPPING ON ORDERS $75+

US ECONOMY ONLY • NO CODE • DOESN'T COMBINE WITH OTHER OFFERS

Happy Tau Day!

It's tau's time to shine. Always living in the shadow of pi, it wants its chance to break out and be celebrated. Well, that day has come!

Wait, but we really do like pi. But tau is 2 pi... Ack, we can't decide!

Enter below by 5pm ET Friday, 6/28 for the chance to win one of two prize packs. Once the contest closes, RandomBot will choose two lucky winners and contact them via email.

The winners will have the choice between:

Tau or pi, which mathematical constant will reign supreme?!

The contest is now closed. Congratulations to Kevin P. from Norman, OK and Kris H. from Harrison, AR! If that sounds like you, we'll be in touch shortly.


We asked you which is your favorite mathematical constant, and the winner is:

Tau vs. Pi
Pi Symbol Ice Cube Tray

Pi Symbol Ice Cube Tray

$5.99 $9.99 Sale

Save 40%

pi*z*z*a

pi*z*z*a

$9.99 $19.99 Sale

Save up to 50%