Whoops, watch where you sit down. Sometimes weirdos put whoopee cushions on the seats.
This official UNDERTALE mug was designed by Audrey Waner to hold 8 oz. of ketchup (or tea). Each one comes with a bonus coaster.
Microwave safe. Hand washing recommended.
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Our custom-made mugs are heavy duty, but if you want them to last a long time you may consider washing them by hand and avoid microwaving. This is especially important for our color-changing mugs, as exposure to constant high heat can remove the color changing ink much faster.