When you replace your RV fridge/freezer with a residential unit, you might want to add a locking system so your doors and drawer do not open while driving. The cost is about $60 (2019)
From their website;
History of the Fridge Fixer
We are avid RV’ers, and frequently go out on long cross-country adventures ever since buying our coach several years ago. But, one particular problem kept plaguing us – the residential refrigerator kept opening while we were driving. When this would happen, everything would start dumping out on the floor. In addition to the huge mess, this creates, it was also a huge distraction while driving. If the refrigerator spilled at the wrong time, it could lead to a tragic driving accident.
As bad as this problem is when driving a coach, it is an even bigger issue if you have a trailer with residential appliances. When you’re pulling a trailer, you have no idea if your refrigerator spilled until you arrive at your destination – sometimes days later. In addition to the mess, the entire contents of the refrigerator and freezer can be spoiled.
Residential refrigerators are commonly installed in recreational vehicles, and for good reason. They have high capacities, they are comparatively inexpensive, and they are attractive. But, residential appliances were never meant to be used in moving vehicles. Several devices are out there to try to keep the doors shut, but most require drilling into the refrigerator, and are cumbersome to engage/disengage.
Our RV shipped with just a bungee cord wrapped around the refrigerator door handles. It usually worked when the fridge was empty but failed miserably once it was loaded with food.
In addition to the frequent fridge spills, our young kids had a difficult time with the bungee. Either they would lose control of the bungee trying to open the fridge – and get snapped in the face, or would be unable to reconnect the bungee when they were finished.
But, even with the bungee, the refrigerator kept opening. We needed to come up with something
One big advantage of cross-country driving is that you get a lot of time to think. The result of this was the original Fridge Fixer prototype. This device worked as intended, but it was not ideal for manufacturing.
Over the next year, and countless prototypes later, the Fridge Fixer evolved into the family of devices being offered today.