Newton Scamander's suitcase - charm for bracelets (Trollbeads, etc.)
Based on the "Fantastic Beasts and Where They Live" movie based on J.Rowling's book.
Magizoologist Newton Scamander owned a magical suitcase, bewitched with an Undetectable Extension Charm, in which he held a number of beasts while he travelled. He could hide the contents from Muggles by flipping a switch on the case.
Newt's suitcase is an old brown, leather suitcase with Muggle-Worthy switches to hide the contents from Muggles.