It seems that these little hair elastics are always disappearing around the house, at friend's houses, in the park, etc. Someone always needs one. I use a pill keeper to hold mine in. I have a green one (my favorite calming color) and the elastics fit perfectly into this little container. I have one for me, to hold mine in my purse, and one I keep in the house for others who might need them. It cuts down on a lot of frustration at losing them.