Stylish shirts and mugs from Riddlehaven, guaranteed to make you look 78% more mysterious. $5.00 flat rate shipping on all orders. MERCH Riddlehaven Unisex Comfort Colors T-shirt $15.00 View Options Riddlehaven Unisex Long Sleeve T-Shirt $17.00 View Options Riddlehaven Unisex Crewneck Sweatshirt $25.00 View Options Riddlehaven Black 11 oz. Mug $12.00 Add To Cart Riddlehaven Green Interior 11 oz. Mug $12.00