white mug against white background. the center says spiritbox in blue outlined text. below that in solid blue text reads "eternal brew". above this shows a black and grey gradient from the mug changing color.
image of black coffee mug against white background.
video of a black coffee mug with coffee being poured into it. a candle burns in the background. the mug changes to white once coffee is poured in it, revealing blue outlined text saying "spiritbox" and below that in solid blue text "eternal brew".

Eternal Brew Black Coffee Mug

Regular price $20.00
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Shipping calculated at checkout.

Only 120 items in stock!
IMPORTANT: DO NOT MICROWAVE THESE MUGS!
THAT WILL RUIN THEIR COLOR-CHANGING ABILITY!