The Star & File pattern was made by Imperial primarily in carnival glass with a limited production in clear glassware in the early 1900s. This was their # 612 line and was listed in an old catalog as a tall ice cream, but could be used as a champagne or a sherbet. This antique crystal pressed pattern catches the light nicely and would be lovely as your ring holder, holding paper clips on your desk or in your dressing area with colored soaps. EAPG stands for Early American Pattern Glass.
This beauty is nearly 5" tall and about 3 3/4 across the top. The only thing I could find worth mentioning is there are a series of bubbles deeply encased in the glass, right near the rim, which is normal for glass of this age.