Cafepress.co.uk has some great designs which you can get on T-Shirts, mugs or stickers. Perfect if you are still looking for a present for that scientist close to your heart…(Disclaimer: I am not getting any advertising money!)
Plant Scientist by day, Superhero by Night.
“Things you shouldn’t say to a PhD student!” mug .
Instant Botanist Magnet – just add coffee.