The makers behind the Insider describe it as "Snapchat for your fridge." It takes a picture of your refrigerator's contents with its sensor and camera every time you open the door, and uploads the pics to your mobile device via an app called Wink. That way, if you forget your grocery list at home, you'll already know what you've got stocked up.

This product is currently still in development.

Last one to buy this gadget is a rotten egg. The Egg Minder is made to track the number of eggs you have and alert you if they start to lose freshness. It connects to an app on your phone, so you'll have it on the go next time you go grocery shopping.

You can snag one on Amazon for $78.

The Milkmaid, currently in development and not yet available to purchase, is a high-tech jug that keeps track of your milk. It lets you know if your milk is about to spoil, and connects to an app so you'll always know how much you have left. Follow its development progress here.

The O3 Pure Rechargeable Refrigerator Purifier Deodorizer and Odor Eliminator is a chargeable device that deodorizes and purifies the air in your fridge. Saving you from contaminants in spoiled food, it also claims to increase the life expectancy of your food by up to five days.

Get it for $69 on Amazon.

How many times have you left the refrigerator door ajar? Probably too many to count, but this Go Green Fridge Alarm was created to solve that problem. It beeps any time you leave the door open for too long, keeping your food cold and you eco-friendly.

You can buy one for $31.99 at True Home Comfort.

If you prefer a door alarm that's a bit more cuddly or inexpensive, try the Fridgezoo line of products.

Get one for $10.79 on ThinkGeek.

The AcuRite super thermometer keeps track of the highest and lowest temperatures in your fridge and freezer. If the temp gets lower than what you'd prefer (you can preset a maximum/minimum temp range), its alarm will go off and notify you.

Get one for $39.99 on AcuRite.