Smart Mug FAQs

A fully charged Glowstone Smart Mug provides up to one hour of heating. Start with a hot drink and recharge the empty mug between drinks. Runtime varies with use, surroundings and battery age.

Yes, on a low-temperature cycle that does not exceed 60°C (140°F), with the mug upside down. Higher temperatures can damage the batteries. Wait at least five minutes after the light goes off before washing. Handwashing helps preserve the fine bone china and decorative details. Keep the charging base, cable and plug out of water.

Glowstone has a fine bone china mug body with a fired, vitrified glaze. A ceramic-coated metal mug has a metal body with a coating applied over it. They are different constructions: Glowstone gives you the feel and appearance of a traditional china mug, with the heating components sealed into its base.

No. The Glowstone Smart Mug works automatically, without an app, Bluetooth pairing or a Wi-Fi connection. Charge it, pour in your hot drink and let the mug manage the heating.

Honeycomb has a distinctive patterned finish, while the Classic designs have a simpler colour finish. Both ranges use fine bone china and automatic heating. Choose Honeycomb for its appearance; it does not require a different way of using or charging the mug. Explore the Smart Mug designs.

A separate mug warmer supplies heat through a plate beneath your cup, so the cup needs to sit on that plate to receive heat. Glowstone carries its rechargeable battery and heater inside the mug, allowing it to heat your drink away from the charging base. Its base is for recharging the empty mug; placing the mug on it switches the heater off.

Fully charge the mug before its first use, then pour in hot tea or coffee. The mug detects the drink and starts heating as it cools towards its drinking temperature. The light bar glows while the heater is working. When you finish, empty the mug and return it to the supplied charging base.

The mug is designed to maintain a drinking temperature of around 62°C (145°F). It lets a freshly poured hot drink cool towards that temperature before the heater works to keep it warm. The light bar shows when the heater is active.

The current Glowstone Smart Mug manages its temperature automatically, at around 62°C (145°F). There are no temperature buttons or app settings to adjust.

Start with a hot drink from your kettle, teapot or coffee machine. Glowstone is designed to help maintain a hot drink’s temperature. It is not a kettle or a replacement for preparing your drink in the usual way. A drink poured below the intended temperature may activate the heater at a lower temperature.

Yes, you can enjoy tea or coffee with milk. Prepare your drink as usual and start with it hot; adding cold milk will lower its temperature. Remove the teabag after brewing, because leaving it in can interfere with the mug detecting that it is empty. Follow the cleaning instructions after use.

Yes, it switches off when it detects your last sip. If the light stays on after the mug is empty, turn the empty mug upside down or place it on its charging base. Always remove your teabag after brewing. The heater also switches off when the battery runs out.

No. Never put the Glowstone Smart Mug in a microwave: doing so can damage the mug and microwave. Prepare your hot drink separately, then pour it into the mug.

The mug has a capacity of 370 ml, approximately 12.5 US fluid ounces. Leave enough space to lift and drink from it comfortably without spilling.

No. Its built-in battery powers the heater while you drink away from the base. Do not use the charging base as a coaster: placing the mug on it switches the heater off. Return the empty mug to the base between drinks to recharge.

Charging from empty takes up to four hours using the supplied charging equipment. Fully charge the mug before first use, then recharge between drinks. Three flashes from the mug confirm that charging has started. The charging-base light goes off when the mug is fully charged.

Yes, the supplied Qi wireless charging base can also charge a compatible Qi-enabled phone. Check that your phone supports Qi wireless charging. Not every phone is compatible, and the base charges one device at a time.

A single-mug pack includes the mug, its Qi wireless charging base, a USB cable and a power adaptor appropriate for the destination. Pair and four-mug packs include a charger for each mug. Check your selected product listing for the pack contents and design choices.

The Smart Mug comes with a one-year manufacturer’s guarantee. For website orders, our 30-day returns policy covers unused items in their original condition and packaging, with proof of purchase. See the full returns policy for details. If your mug is faulty, contact support@glowstone.tech for help. Your statutory rights are unaffected.

Enter your delivery address at checkout to see the delivery charge for your order before paying. If you need your mug for a particular date, contact us before ordering with your postcode and chosen design so we can confirm the current delivery estimate.

Check that the supplied charging base and cable are connected. Lift the mug, wait a few seconds and place it centrally on the base again, adjusting its position slightly if necessary. Three flashes confirm charging; a blue light on the base alone is not enough. If the battery is completely empty, leave the mug on the base for at least 15 minutes before lifting and replacing it. Allow up to ten seconds for the flashes. If it still will not charge, contact us.

Yes. The supplied charging base stops charging when the mug is fully charged, and its light goes off. Only place the empty mug on the base. Follow the safety instructions in your manual and use the supplied charging equipment.

The English manual linked below (version 5, December 2024) describes these signals:

• One flash: the mug has detected your hot drink.
• Three flashes on the charging base: charging has started.
• A steady light: the heater is working.
• Four flashes: the batteries have run out.
• Eight flashes before switching off: the mug has detected that it is empty.
• Charging-base light off, followed by one mug flash when lifted: the mug is fully charged.

If your mug behaves differently or your supplied manual differs, contact us with its model details so we can help you identify the correct instructions.

Empty the mug, remove any teabag, then turn the empty mug upside down or place it on its charging base to switch the heater off. Wait at least five minutes after the light goes off before cleaning, and do not touch the inside while the light is on. If the problem continues, contact support.