Feldspar Rocks Mug (with colour inside)

What it is

• White ceramic mug with a coloured interior and matching handle
• Two sizes: 11 oz and 15 oz
• Full wraparound print — the FELDSPAR ROCKS DUDE! design appears identically on the left and the right, so left-handers and right-handers both get the good side
• Ten interior colours: Black, Blue, Dark Blue, Dark Green, Golden Yellow, Green, Orange, Pink, Red and Yellow (11 oz); Black, Blue, Dark Blue, Dark Green, Pink and Red (15 oz)
• Glossy, fade-resistant, scratch-resistant finish
• Dishwasher and microwave safe
• C-handle, lead and BPA free

About the artwork

Feldspar is about 60% of the Earth's crust and nobody has ever thrown it a party. This mug is the party: halftone dots, a comic-book starburst and a cluster of pink and orange crystals detonating out of the middle, with DUDE! signed off underneath like a skate sticker from 1991. Because it's printed on both sides, the joke lands whichever hand you drink with — and whoever is sitting opposite you gets the full show too.

Give it as a gift

For the rockhound, the geology student, the person whose desk is 40% pebbles, and anyone who has ever picked up a stone on a walk and quietly put it in their pocket. Pick their interior colour and let them wake up shouting about minerals.