You can easily turn your blender into a Magic Bullet and create awesome smoothies, sauces, salad dressings, marinades, salsa, baby food and even whip cream! The possibilities are endless. All you need is a blender and a standard mason jar. Wide mouth jars won't work with this hack because the base of the blender won't fit on a wide-mouth, but fits perfect with the standard. This should work with most blenders, but no guarantees.
* Caution * Never use Hot Liquids, which can cause the glass to break and potentially cause harm to yourself and ruin your food.
Link to original source
Step 1: Tools and Ingredients
Standard Mason Jar - Not Wide Mouth
Ice - Half a jar of but will vary depending on what you are making
1/2 cup strawberries - Rinsed and sliced
1 1/2 bananas - peeled and sliced
Half a jar of ice cubes
Orange Juice - 1/2 Cup
Place ice along with the fruit into the mason jar. Pour in the orange juice.
Step 2: Time to Hack
Warning - Be Cautious of Sharp Blades
Remove the base from the blender including the blade. Next carefully insert the blade face down into the mason jar. Screw in the base until it is nice and tight.
Step 3: Blend
Place the mason jar onto the blender and turn it until it is secure. Blend! I used the ice crush setting on my blender, but the settings will vary depending on what you make. Remove the jar from the blender and unscrew the base. Enjoy your smoothie right from the glass!