Fill this Mathematical Musings notebook up with your most ingenious math models

this lightweight cotton tee will keep you comfy and looking smart

Here's a shirt celebrating the wonders of DNA

Impress your physical therapy clients while you enjoy a drink that says cold – or hot – all day

Woodland Forest 12 oz Steel Bottle Blank Fill this Mathematical Musings notebookFill this bottle with refreshing cold water and stay hydrated on your next hiking adventure, or pour some nice hot coffee and sip peacefully on your next camping trip. With a textured design for a unique tactile experience, this flask will keep your drink hot or cold until you're ready to enjoy it.