Your search for "death note　マグカップ" revealed the following:

©2014 Ryogo Narita/KADOKAWA, published by ASCII Media Works/Ikebukuro DollarsIntroducing the “Orihara Ryōya ar-Unity Motif Mug,” part of the “ar-Unity” design line—which features desk-related goods inspired by the TV anime “Durarara!!×2.”The design incorporates motifs symbolic of Ryōya Orihara—such as a knife,...

© Aki Hamaji/Houbunsha・AniplexIntroducing the "Muran-san Illustration: Hitori Gotō Live Costume Ver. Mug," a collaboration item between the anime "Bocchi the Rock!" and "Muran." This mug features an original illustration of Hitori Gotō drawn by Muran-san.This slightly larger mug can hold...

(C) & TM Lucasfilm Ltd.Merchandise featuring original illustrations from "DEATH NOTE" is now available!■ Size: Approx. H80 × W80 mm or less ■ Material: Paper ■ Distributor: Stella Notes

(C) & TM Lucasfilm Ltd.Merchandise featuring original illustrations from "DEATH NOTE" is now available!■ Size: Approx. H80 × W80 mm or smaller ■ Material: Paper ■ Distributor: Stella Notes

(C) & TM Lucasfilm Ltd.Merchandise featuring original illustrations from "DEATH NOTE" is now available!■ Size: Approx. H100 × W75 mm or smaller ■ Material: Acrylic ■ Distributor: Stella Notes