The Regenbogen Regular Cup is handcrafted from heavy crystal, then treated with a special chromatic film on the underside that exaggerates and distorts the crystal's natural ability to split light into the seven rainbow pains.

This substantial bowl can also be used as an ashtray and makes a perfect centerpiece for a coffee table or dinner table.

The ideal piece to offer at a house opening or other festivities.

Inspired by the Mathematics of Nature, Fundamental Berlin is a company founded in 2011 that designs sophisticated design objects.