wrote on Feb 26^th, 2010 at 9:44pm:

Some years ago on my very first trip into the Q, on the second morniing at a very nice island campsite in Agnes, I dropped the jar of instant coffee and dumped pretty much all of it on the ground. Fortunately, they make the individual packets now, but back then I was decidedly unpopular, given that we had about 7 more days with no coffee at all. I'm pushing 20 years with the same group of guys, and I was stunned I was ever asked back even the second time!

Where's the problem?  Just sweep it up back into the jar the best you can and use as usual.  Whatever doesn't dissolve is clearly not coffee and can be filtered with your teeth as you drink.