Step 1: Case
Grab a plier's and hold at one end of the straw away from the edge only a little for room to melt, Melt release the straw and scroll down:-)
Step 2: Inside
Second get some fluff cotton ect... and mabye put kerosene on it be creative.
Then get tape and put it around the match and striker like in the picture above.
Insert the inside into the straw and put the cotton either rapped around the match or in between the tape.
Step 3: Finish
Also test to see if water proof by putting it in a bathtub or filled sink.
Hope you enjoyed it! if you did don't forget to vote and comment below please Thanks if you do!:-)