Advanced Shaker

So I have a zillion, okay maybe not a zillion, shakers for kindergarten and early first grade, but next year my mom, also a teacher at my school is changing positions from reading specialist to second grade!  On a local selling group, I found this awesome shaker:

 I thought she could use it for those early finishers.  I want to have a recording sheet.  But how to store said recording sheets?  Not in their desks of course, they'd get lost in a minute! :)

Ideally, I'd like them to be kept by the container, but what if two were working at the same time? They couldn't be contained together... so help a gal out and the follow up post will include your own printable- in case you have this same shaker :}