Boiling water is too hot to drink. Lukewarm water loses its appeal. Traditional vacuum flasks keep water hot for hours but offer no control — leaving users waiting, guessing, or burning their tongues.
Glacier Coolant has solved this everyday problem by applying its core expertise in phase change materials (PCMs) to a familiar product: the insulated drinking cup.
From Industrial Coolants to Everyday Comfort
Glacier Coolant is best known for high‑performance heat transfer fluids and phase change materials used in cold chains, industrial refrigeration, and battery thermal management. Now, the company has adapted its technology for consumer use.
A phase change‑powered tumbler that actively regulates water temperature — no batteries, no buttons, no waiting.
Solving the Leakage Problem: Solid‑Solid PCM
Traditional phase change materials transition from solid to liquid when they absorb heat. That liquid state creates a risk of leakage — a non‑starter for a drinking cup.
Glacier Coolant’s R&D team overcame this limitation by developing a solid‑solid phase change material, derived from its proprietary LM‑XR‑36 formulation.
Key advantages of solid‑solid PCM:
No liquid phase → zero leakage risk
Safe for direct consumer contact
Improved thermal conductivity for faster temperature adjustment
Long cycle life without degradation
This breakthrough makes PCM technology practical for everyday drinkware — something previously unavailable on the market.
How It Works: Cool Down, Then Stay Warm
The cup contains a sealed layer of solid‑solid PCM surrounding the inner chamber. It acts as a smart thermal regulation zone.
Step 1 – Rapid Cooling
When near‑boiling water is poured in, the PCM rapidly absorbs excess heat. In approximately three minutes, the water temperature drops to around 40°C (104°F) — the ideal range for drinking immediately. No burning, no waiting.
Step 2 – Long‑Term Temperature Holding
Once the water reaches a comfortable drinking temperature, the PCM switches to heat‑release mode. It slowly returns stored energy to the liquid, keeping the contents at approximately 36°C (97°F) for an extended period.
Unlike a standard thermos that holds heat but cannot cool, or a cup that simply loses heat, this active regulation maintains drinking‑ready temperature from the first sip to the last.
No Electricity. No Complexity.
Electrically heated mugs and smart cups exist, but they require charging, cables, or docking stations. Glacier Coolant’s phase change cup works entirely through physical thermal dynamics:
No power source needed
No activation time
No maintenance
Safe and portable anywhere
Whether at a desk, on a commute, outdoors in cold weather, or at home, the cup delivers consistent performance without relying on external infrastructure.
Designed for Real Life
Beyond the technology, the cup is built for everyday use:
Leak‑proof solid‑solid PCM construction
Durable, easy‑to‑clean materials
Compact form factor for bag or car cup holder
Suitable for coffee, tea, or hot water
The technology works silently in the background — users simply pour, wait three minutes, and enjoy.
From the Lab to the Lifestyle
Glacier Coolant has spent years developing phase change solutions for demanding industrial applications. Bringing that expertise into a consumer product represents a natural evolution — proving that advanced thermal management is not just for factories and freezers.
The phase change tumbler is a practical example of how deep technical work can create simple, valuable experiences in daily life.
Glacier Coolant is exploring additional consumer applications for solid‑solid PCM technology, including:
Food delivery containers that maintain serving temperatures
Medical transport cases for temperature‑sensitive medicines
Personal heating/cooling devices for outdoor or athletic use
For now, the phase change cup offers a simple promise: hot water that’s ready to drink when you are — and stays that way until the last sip.