Presumably, this bottle is Kimax or Pyrex, and can handle minor heating of the sort Borek: mentions, or even more if you're not as careful. I'm still left confused ... you originally posted this in Chemical Engineering, are you looking for a hi-tech way to get the solid out? If I suggest that you scrape it out with a spatula, are you still worried about a very energetic reaction? Its important to be aware of safety, but you're going a bit overboard. I expect you to ask if you can use any spatula ... and you certainly can: metal, porcelain, glass stirring rod, spare wooden tongue depressor.
Here's funny story, I massed out a bunch of NaOH pellets, and I wanted to add some distilled H2O (I was making some strong NaOH solution to pH adjust a buffer, so amounts aren't important.) Anyway, I had the pellets in a weigh dish in my hand, and I went to the dH2O tap, and I'd forgotten the heat exchangers were offline. So 70 C H2O hits NaOH and immediately begins to boil -- the water boiled away in seconds, leaving a dry powder of NaOH, and me going "Uh..Uh..Huh" My hand didn't even get hot, it actually felt cool. I was fine, behind my safety glasses, lab coat, and nitrile gloves ... but I wouldn't try it in my hand twice.