Stasher bags are the beach picnic MVP.

Yes, a quality silicone zip bag like Stasher or a similar silicone bag with a double-seal closure is your best bet.

Sand gets into everything — except a properly sealed silicone zip bag. Unlike Tupperware with hard plastic lids that can warp or leave tiny gaps, a silicone bag presses shut fully. No sand sneaks in. Plus, they’re flat, so they pack easily in a cooler or beach bag.

I’d skip containers with clip-on lids. Even the good ones can pop open if the cooler gets jostled. A zip bag won’t. And cleanup is easy: rinse or toss in the dishwasher.

Your sandwich stays sand-free, and that’s a beach win.