If you’ve ever reached for your tumbler hours after filling it, only to find your drink still ice cold, there’s real science behind that. The secret lies in vacuum insulation, an innovation that’s now common in quality drinkware. But what exactly is vacuum insulation, and why does it work so well?

In this blog, we break down the science behind vacuum insulation and how Potable™ uses it to design tumblers that are as functional as they are stylish.

What Is Vacuum Insulation?

Vacuum insulation is a method of maintaining temperature by eliminating heat transfer between the inside of the tumbler and the outside environment. Most insulated tumblers use two walls of stainless steel with a space between them. That space is then vacuum-sealed, meaning air is removed to create a vacuum.

Air is a conductor of heat. Without it, the transfer of heat, whether in or out, is dramatically slowed. That’s why vacuum-insulated tumblers can keep drinks cold or hot for extended periods.

Potable™ takes it a step further. Rather than double insulating their tumblers. They use triple-wall vacuum insulation in their drinkware. This is done using a middle layer of copper for even better thermal control. This is what helps beverages stay cold for 37+ hours and hot for over 13 hours, making it one of the most reliable options for travel, work, or everyday use.

How It Works in Practice

Let’s say you fill your tumbler with ice water in the morning. Without insulation, the external temperature will affect your drink quickly. But with vacuum insulation, your tumbler blocks that external influence.

The interior wall touches your beverage, while the outer wall faces the external environment. With a vacuum in between, heat doesn’t travel from your hand to the drink, or vice versa. That means your cold drink stays cold, and your hot coffee doesn’t cool off after an hour.

This science is also what keeps the exterior of a Potable™ tumbler from sweating or getting too hot to touch. Everything stays where it belongs: your drink inside, and the heat or coldness outside.

What Sets Potable™ Apart

Many tumblers claim to be insulated, but not all insulation is created equal. Some use only a single wall. Others don’t have a true vacuum seal. Some skip the copper layer entirely, which impacts performance.

Potable™ doesn’t cut corners. Each tumbler is built from 316 stainless steel, a higher-grade metal that resists corrosion, and lined with a ceramic interior. The triple-wall structure, combined with copper plating and a vacuum-sealed core, creates unmatched thermal performance. Whether you’re sipping from the Dual Wave Behemoth™ 64 oz, the Triple Ripple Odyssey™ 40 oz, or the Voyager™ 30 oz, you get lasting temperature control that feels effortless.

But it’s not just about insulation. Potable™ tumblers are designed for real-world use. Our lids are leak-proof. Designs fit in most car cup holders. Handles are ergonomic. It’s drinkware that works without compromise.

Why It Matters

The science behind vacuum insulation isn’t just interesting, it’s part of your daily comfort. If your tumbler can’t keep up with your lifestyle, it becomes a hassle. No one wants lukewarm coffee halfway through a meeting or melted ice before the commute ends.

With Potable™, you don’t have to think about it. Your drinks stay exactly how you poured them. The technology just works, quietly and consistently.

And because Potable™ drinkware is built for repeated use, you’re not only getting better performance, you’re making a better environmental choice. Each tumbler replaces hundreds of single-use cups or bottles each year, making it both smart and sustainable.

Final Note

Understanding the science behind vacuum insulation helps you make better decisions about the drinkware you use every day. It’s more than just metal and design. It’s a precision-engineered solution to keep your beverages exactly how you like them.

Potable™ combines that science with luxury-grade materials, aesthetic design, and real-world convenience. Whether you’re on a road trip, at your desk, or heading to the gym, your drink stays ready when you are.

Explore the Potable™ collection today and experience vacuum insulation that actually lives up to the promise.