Depending on what you use your tickle file for, you can make a miniature one using index cards or index-card-sized pieces of paper, folded into little folders or just lying flat between the items which would also be index-card-sized, for example little notes referring to larger documents you can find elsewhere.

Or you can put your whole tickle file into one folder (to avoid carrying the weight of all those folders) and write the date near the edge of each item you insert (or the first item for each day).