You've just made up a batch of tapioca pearls (found here https://www.instructables.com/id/How-to-make-Tapioca-Pearls-from-scratch) but you don't want to use them all. Never fear! I'm going to tell you how to store and re-use your leftovers.
Step 1: Storage.
Ok, so you've made your pearls and drank your tea but now there's leftovers, that's fine. Keep them in your syrup and cover tightly with plastic wrap or transfer to an airtight container. They will only keep for about 36 hours I have found, but I'm surprised I kept them that long! All in the name of science, I guess.
Step 2: Prep and Cook.
Bring your mix to the boil then spoon in the pearls, retaining the leftover syrup in your container.
You will notice the pearls will have turned white while in the fridge, basically you are going to cook them until transparent and bubbly again.
Once they're cooked spoon them into the syrup and allow to cool. Done!
Step 3: Enjoy!
I have found after around 36 hours the pearls start to break down and you will see white, floaty strands in your syrup. After 48 hours they become like rock and after 72 hours they start to smell a little funky. Generally I only leave them overnight but I stretched this as long as possible to document my results.
I would not recommend re-heating them for a second time and I haven't tried this in a microwave but I wouldn't advise that either.
One thing to note is the flavour will intensify the longer they are left in the syrup, so just be aware if you are using anything stronger than brown sugar.
Anyway, I hope this helps your tea making endeavors. As always, please share your thoughts and opinions in the comments :) \m/