I am in a mood to share, and am bored with reading the same shower, toothbrush, and towel techniques.
If you are looking for something different, too ~ take a look in the fridge. Just make sure you clean up well afterwards.
Look for the footlong hot dogs or weiners. They are so long that you can lay on your back or kneel and fuck yourself from underneath. They are cold straight from the the fridge or you can warm them up a bit in the microwave (not too hot.)
Carrots are wonderful, several different sizes from long and skinny to fat and thick all in one bunch.
Cucumbers for those of us ladies who like them really big and wide.
Popsicles are great for masturbating and are a special flavored treat if you have someone who likes to eat you out afterwards.
There are so many great things to masterbate with, but these are usually there already or easy to buy without raising any suspicion of the fun you will have!