Printed to order
Optimal Caffeine Coefficient
About this design
Set on an off-white (#F8F9FA) vintage grid paper background. The centerpiece is a navy blue (#0F2C59) retro calculator silhouette with gold (#FFD700) buttons. Emerging from the calculator screen is a chaotic, hand-drawn mathematical formula using integrals, square roots, and pi symbols that ultimately equals 'C'. Below, in a crisp vintage technical typewriter font, the text reads: 'Calculating The Optimal Caffeine Coefficient.' Forest green (#337357) accents highlight the hand-drawn math symbols.
Fabric & fit
100% ring-spun cotton, 5.3 oz — soft, breathable, holds its shape wash after wash. Unisex fit: true to size; for a relaxed fit, size up.
| Size | S | M | L | XL | 2XL |
|---|---|---|---|---|---|
| Width (in) | 18 | 20 | 22 | 24 | 26 |
| Length (in) | 28 | 29 | 30 | 31 | 32 |
Shipping & returns
Every tee is printed after you order it — usually within 2 business days — then ships from the USA (3–5 days). Misprints or damaged items are replaced free within 30 days. Because each shirt is made for you, we can't accept size-exchange returns; check the size table before ordering.
