This store definitely caters well to the tourists on the strip with it's convenient location. Shocking I know but, we stopped in for some aspirin after our first night in Vegas and I somehow forgot to pack my hairspray.
This store has an entire aisle of travel sizes of anything you may need, cold beer and travel size bottles of liquor. While waiting in line we noticed that they had some grab and go sandwiches, fruit cups and healthy/wholesome prepared food options. They also have some souvenirs like key chains, magnets, t-shirts. etc.
You can probably find anything you need here and the pricing isn't too bad being on the strip.