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Usually at Walgreens they don't have much of a choice, you can get Depends, a classic. Or sometimes they have Tenas. Or they have their own brand called Certainty which is a cloth-like diaper which sucks because it isn't plastic backed.
I noticed you are of the Tau'ri, are you a Stargate Sg-1 fan? I am. I got the whole series on my computer. We should start an Sg-1 club.
I've been using Walgreen's Certainty Fitted Briefs for more than a year, since Baby Grizzy turned me on to them. They are pretty good, almost the best that can be bought locally. The medical supply store has Prevail, which seem to be made on the same production line as the Certainty and are marginally better.