Celebrate America's 250th with these patriotic keepsakes and collectibles, from $16

As America prepares to celebrate its 250th birthday, commemorative products are already hitting virtual store shelves. From 250th anniversary American flags and patriotic baseball caps to challenge coins minted by one of the country's oldest mints, these are some of the standout items worth checking out.

READ MORE: America 250 is coming: What to know and the best commemorative gear to buy

America's 250th birthday only happens once — so get a flag that marks the occasion. Reminiscent of the original flag...