All my flossers, stickers, change, biz cards, emergency headache meds/antacid, etc, a little bit of everything you may need, taking up no space.
Fits perfectly in my balance bags. Essential
I wear two hydration holsters everyday with a belt, even in sweatpants and athletic shorts.
Traveling, hook through security, or being able to hold my smoothie in my pocket while walking my dog. Use cases are endless. Just necessary always for me.