To best maximize your Rambler® Food Jar’s heat retention, we recommend warming the jar prior to use by pouring hot water into it and letting it sit for a few minutes. Once you empty out the hot water, your jar will be warm and you can fill it with your hot food.

The MagVent Lid vents as it opens, which causes a hard stop to occur after the first quarter turn counterclockwise. To remove fully, just keep turning past this point until the lid comes off.

Yes, Rambler® Insulated Food Jars are double-wall vacuum insulated.

Yes, Rambler® Insulated Food Jars are 100% leakproof when the lid is securely fastened on.

Of course! The Rambler® Insulated Food Jars are food-safe, BPA-free, and designed to be used with hot or cold foods. However, they are not designed to heat or cool food to a safe temperature. Also, be sure to always use food safe practices when preparing and serving food.

The Insulated Food Jars are designed to be used with all food and liquid types. However, do not use the Insulated Food Jar with carbonated, dairy, or fermenting food or beverages. Over time, these items can cause pressure to build inside the container. If pressure buildup occurs, the cap can be difficult to remove or forcefully eject and cause injury.

No. Since they are made with 18/8 kitchen grade stainless steel, they can not be used in the microwave, as fire or personal injury can occur.

No, the Rambler® Insulated Food Jars were designed specifically for food contents and are only compatible with the MagVent lid.