The rules say a limit of 2 sweepstakes entries but you can play the instant game once per day.
Instant Win Prize Award Descriptions

One (1) Zig-Zag Small Vintage Starburst Rolling Tray. (100). $9.99 ea.
One (1) Zig-Zag Motif Hat. (50). $24.99 ea.
One (1) Zig-Zag Glass Ashtray (100). $19.99 ea.

One grand prize winner will receive a 3-night trip to San Francisco to attend the Outside Lands Music and Arts Festival, with an approximate retail value of $5,800.