Here is a packet of "Bath Essence", which is probably a perfumed powder or crystals that you sprinkle into the bath to make scented water. It isn't a 100% Sonic product (how do you smell fast?) because it's a part of a crossover promotion with the Love Live! show's character Rin. Several other crossover items can be found around Gear like a Standee, Ramen, Plush & Figure. The pink packet shows the main cast of the show, but without Sonic.