Starting in 1998, plastics were imprinted with a resin identification code to let consumers know the type of resin used in the product.  Running 1-7, all plastics are not able to be recycled locally.  While all communities have their own systems (and thus, their own rules about which plastics they will accept as recyclable), here is a little breakdown for your own information.

  Most clear bottles are marked with a #1 and most opaque bottles (like laundry detergent or anti-freeze) are marked with a #2.  These are the most easily recyclable in most community programs.  However, many communities now accept numbers as high as #5, though, again, occasionally with some exceptions.  Even the infamous plastic grocery bags are recyclable at most grocery stores (they are usually a #4).  When you realize that a standard plastic bag takes 1000 years to break down, a little extra effort to recycle doesn't seem too bad.  Check into your community recycling program for their guidelines for plastic and other materials.