I sometimes find Advil and Tylenol in small cases that are bit smaller than a shot shell and come with ten of either and a lot of empty space. Walmart also has small bottles of both in their housebrand that come with 50 tablets in a 1" diameter x 1.25-ish tall, that you can add about 40-50 more to.
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-IronRaven

When a man dare not speak without malice for fear of giving insult, that is when truth starts to die. Truth is the truest freedom.