Products
| Stainless Steel - Vacuum |
Glass - Vacuum |
Foam | Double-wall | |
|---|---|---|---|---|
| Heat retention rating | Best, usually 12 hours | Next best : usually 8 hours | Third, pretty good | Lowest retention |
| How to make it | Create a double wall area between the exterior and interior wall. Take the air out between the walls with a machine. The double vacuum method used by Trudeau is superior to the single method used by our competitors. | A glass bottle that has a double wall and vacuum construction. | A double wall format, made by placing polyurethane between two walls. | Air space between the exterior and interior wall. |
| Benefits | Vacuum makes it the hardest for ambient air to change the liquid or food temperature in the container. | Excellent insulation. | Improved retention to double-wall. Lower price with good insulation. | Good insulation at a low price. |