They came out this year but they were not covered here (I think). I acquired the Mcdonald's Nerf Super Soaker squeezie squirt things (center top of image) for the price of free - someone had left them in their packaging on top of a garbage can while I was waiting for food.
You can grip them with your fingers, making them concealable I guess? And you fire it by squeezing with your thumb I guess? I haven't tried actually firing them.
Still, YOUR HAND IS THE BLASTER HAHA