89. “Battlescratch Shirt”
What it is: A shirt that has a grid printed on the back to let people know where they can scratch.
Invented: 2016
Average Price: $18.99 – $$19.97*
You may have had an itchy back, but you didn’t know what to do to get someone else to scratch the area. Battlescratch is another Japanese invention which allows you to receive accurate back scratches. This t-shirt is available from online retailers such as Amazon and Banazatee. It has a grid similar to the one in the Battleship game.

You can use a pad of paper and a grid to identify the quadrants (letter/numbers) that itches. Then, scratch away. Banazatee sells this product for $18.99. Similar products are available on Amazon, but they cost a little more.