I probably could have gotten a new drawstring bag but this was with be form 6th grade to 9th and i still use it to this day.
It has an inner diamiter of 10mm (3/8in) and an outer diamiter 38mm (1.5in) so it will not work for all bags feal free to edit it how you want.
This was the first was thing i ever designed and it was made with an anet a8 and it was designed with thinkercad.