A Versatile Blender
Similar to a coffee maker, a blender can save you money just by providing you with the option to make a fancy protein smoothie at home. It can also save you the expense of buying premade baby food, which can easily cost over $1 per jar or packet.
If you buy one that is a jack-of-all-trades, such as this Nutri Ninja Blender from Walmart for $120, you can save on buying multiple gadgets. A blender like this is great for making other purees, dips, soups, dough (depending on the style), as well as chopping and mincing.