Nextmug Plus 18 oz Slate Blue Temperature-Controlled Mug - Keeps

In this review of the Nextmug Plus 18 oz Slate Blue, the bottom line is simple: if you want a larger self-heating mug that keeps coffee or tea at an exact serving temperature for hours, this is a strong candidate. Designed with three temperature presets and an easy on-board control, the Nextmug Plus aims at people who sip slowly, work at a desk, or move between rooms and want their drink reliably warm without reheating. The review finds it especially useful for home offices and anyone who values a clean ceramic matte finish paired with a stainless-steel core.

Key Features

• Three temperature presets: Offers Warm (130), Hot (140), or Piping (150) so users can choose the exact drinking temperature and maintain it for hours.
• Long-lasting battery: The integrated lithium-ion battery and docking coaster deliver sustained warmth and portability without constant access to a power outlet.
• Real-time status indicators: LED lights show battery life and current temperature so there is no guessing about readiness or remaining runtime.
• Spill-resistant lid and charging coaster: Includes a lid that helps retain heat and a charging dock with a 6-ft cord for convenient recharging at a desk or countertop.
• Large 18 oz capacity: Holds 29% more liquid than the standard 14 oz Nextmug, reducing refill frequency for larger morning cups.
• Ergonomic ceramic matte finish: A ceramic-like matte exterior over stainless steel gives the mug a premium hand feel and a refined look for home or office use.

Who It's For

The Nextmug Plus is aimed at people who drink slowly or work through long tasks and want their beverage kept at a chosen temperature without frequent reheating. It is well suited to home office workers, parents juggling chores, and anyone who prefers an 18 oz serving of coffee or tea that stays hot for hours.

Those who need ultra-light travel gear, a fully insulated vacuum tumbler for extreme outdoor use, or who prioritize maximum battery runtime beyond typical daily use might look elsewhere. The Nextmug Plus is best used in semi-stationary scenarios where the docking coaster can be convenient for recharging between uses.

Pros & Cons

Pros

• Consistent temperature control keeps drinks at preset Warm, Hot, or Piping levels without altering taste.
• Larger 18 oz capacity fits a generous morning serving and reduces trips to refill.
• Well-crafted ceramic matte finish and ergonomic handle make it comfortable and attractive to hold.
• Simple on-board controls and LED indicators remove the need for an app or extra setup.

Cons

• Battery life receives mixed feedback from customers, so heavy all-day use may require more frequent recharges.
• Not intended as a rugged travel mug for long hikes or extreme conditions where vacuum insulation is preferred.

Specifications

Model	Nextmug Plus (Slate Blue)
Capacity	18 oz
Temperature Presets	Warm 130, Hot 140, Piping 150 (degrees)
Finish	Ceramic matte over stainless-steel body
Included	18 oz Nextmug Plus, docking coaster with 6-ft cord, spill-resistant lid
Controls	On-board control button, LED battery and temperature indicators
Design Origin	Designed and tested in Boulder, Colorado, USA

Our Verdict

The Nextmug Plus 18 oz Slate Blue is a strong choice for people who want reliable, simple temperature-controlled performance and a larger serving size. It pairs smart battery-backed heating with an attractive matte finish and ergonomic handle, delivering good value for home and office use; just be mindful of battery expectations if you need continuous all-day warmth without recharging.

Frequently Asked Questions

How is the temperature set?
The mug uses an on-board control button to cycle between Warm (130), Hot (140), and Piping (150) and to turn the unit on or off.

What comes in the box?
Included are the 18 oz Nextmug Plus, a docking coaster with a 6-ft cord to charge the internal lithium-ion battery, and a spill-resistant lid.

Can I mix parts with other Nextmug models?
Yes, all Nextmug mugs, lids, docking coasters and accessories are fully compatible across the product family.