[leadin]Building on its popular line of tumblers, lowballs, and koozies, YETI releases three water bottles this spring. We tested the Rambler Bottles (18, 36, and 64oz) with hot and cold beverages for a first look review.[/leadin]
YETI Rambler Bottles hit the market in spring 2016. They are durable, leak-proof, double-wall vacuum insulated bottles that work for everything from coffee and water to soup or chili.
Double-Wall Insulation
Double-wall vacuum insulation has been around for a very long time. The first vacuum insulated flask was invented by Scottish physicist and chemist James Dewar in 1892, and it was put to commercial use by Thermos Gmbh in 1904. So, YETI didn’t re-invent the water bottle with this insulating design. But the brand made a solid version of this popular and time-tested insulated bottle.
Using “kitchen-grade” 18/8 stainless steel, the YETI Rambler Bottles are not lined with plastic or other substances that could leach into your beverage. As with all bottles of this style, they have a vacuum between the two walls of the vessel, which stops heat transfer, keeping the internal contents hot or cold for a long time.
YETI Rambler Bottle Review: Hot And Cold Liquid Testing
With vacuum-insulated bottles, the biggest source of heat transfer is from the cap, which is not vacuum sealed and eventually allows the cooling or heating of the internal liquid.
We tested both hot and cold liquids in the YETI bottles.
To test hot liquids, we filled a Rambler Bottle with boiling water and set it outside on a cold, snowy Denver day. The outside temperature hovered around freezing.
Four hours later, we opened the bottle and checked the temperature with a meat thermometer. The water registered 160º F, which is about the perfect temperature for a hot coffee or tea, as a quick sip test confirmed.