I Solemnly Swear That I Am up to No Good™/Mischief Managed™ Giant 20 oz. White Mug "swym-disabled" and designed by MinaLima

and designed by MinaLima

The magical adventure begins when Harry Potter is invited to attend Hogwarts School of Witchcraft and Wizardry

as well as a perfect gift for Harry Potter fans

Marvolo Gaunt's Ring

I Solemnly Swear That I Am up to No Good™/Mischief Managed™ Giant 20 oz. White Mug "swym-disabled" and designed by MinaLimaI Solemnly Swear That I Am up to No Good! This giant 20 ounce Harry Potter mug features the password to open the Marauder's Map on one side, and the phrase that closes the map, Mischief Managed, on the other side. This white ceramic mug holds 20 ounces of your favorite hot or cold beverage and is microwave and dishwasher safe.