It took until 2021 to get a new Sonic hygene item, and here it is! A whole set of them, actually!
These are Handi-Sanz brand hand sanitizer bottles. When the pandemic continued, hand sanitizer companies began to proliferate and then attempt to make sanitizing cool. In this case, it works because here are Super Sonic, Sonic, Tails & Knuckles themed bottles, all in classic style.
Each bottle is clear with clear gel alcohol based sanitizer inside. It is in a soft color-coordinated rubber sleeve. The sleeve has that flat/layered cut-rubber (common on keychains) with the character on it. They are about the size of a keychain charm. The rubber continues to form the soft adjustable loop for hanging it on a bag, purse, or key chain. You CAN refill the bottles too! If it runs out, just unscrew the top and use a big one to refill it. That way, you can always have a Sonic character at the ready with sanitizer. Super Sonic & Tails get neoclassic art for the character cut out. But look at Knuckles. There is a random bump on the top of his head...what is that? It looks like it's there to cover over the other corner of the top of the bottle? Is it some kind of miscalculation? It is a mystery. These are confirmed in Target....but up by the register area in a cardboard stand. They are about 4.99 each. (So, about the price of a key chain) These are in the SonicGear collection.