Harry Potter Stainless Steel Tumbler with Straw, Glow Gradient
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Harry Potter stainless steel tumbler with a glow gradientBlack magic styling meets a glow-in-the-dark finish you can take anywhere.
This Harry Potter tumbler wears a black to silver gradient that picks up light during the day and glows when the lights go out. Stainless steel body, a screw-on lid that seals the opening, and a reusable metal straw. The front carries a decorative emblem in the series style, and the body is printed with text that nods to the wizarding world.
- Gradient finish that glows in the dark
- Stainless steel with screw lid
- Reusable metal straw included
- Harry Potter themed styling
What sets this tumbler apart
Glow gradient
The black to silver fade absorbs light and glows when darkness falls. No batteries, no switches, just photoluminescent material doing its work.
Stainless steel build
A metal body that handles iced drinks and hot coffee without sweating or denting easily. The screw lid closes tight.
Straw ready
Ships with a metal straw that threads through the lid. Sip without tilting, and rinse the straw when the day ends.
Harry Potter details on every side
The decorative emblem on the front pulls from the series aesthetic without copying a house crest or the school seal. Text wraps the lower body in a font that reads as wizarding world adjacent.
The gradient runs from black at the base to silver at the rim. Under UV light or after sitting in daylight, that finish glows soft in a dark room. The effect fades as the stored light runs out, then recharges the next time the tumbler sees sun or bright indoor lighting.
Charge the glow before you show it off
The luminous effect needs light first. Set the tumbler in direct sun for ten minutes or under a bright lamp for twenty, then take it into a dark space to see the glow at full strength. The brighter the charge, the longer it lasts.
What you get
Answered straight
How long does the glow last?
It depends on how much light the tumbler absorbed and how dark the room is. After a full charge in sunlight, expect a visible glow for thirty minutes to an hour before it fades. Recharge it under any bright light and it glows again.
Is this an Harry Potter tumbler?
The product does not state a licence. It carries Harry Potter themed styling with a decorative emblem and series-style text. If you want more character drinkware, check our Hello Kitty tumbler or Snoopy stainless steel tumbler.
Will the glow fade over time?
Photoluminescent coatings can lose intensity with years of UV exposure and washing. In normal use, the glow effect should hold for a long while. Hand wash gently to extend its life.
Who this cup suits
You will like it if you want
- A Harry Potter tumbler that does something different in the dark
- Stainless steel construction with a straw for daily iced coffee or water
- A gift for a fan who already owns the standard merch
Look elsewhere if you need
- Confirmed insulation specs or a vacuum seal for all-day cold
- Harry Potter merchandise with authentication
Glow on, Potterhead
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