How To Get The Slime Scooper After The Quest Green Gloop?

After getting out of the Slime Cave, I simply threw the extra slime balls I got in the cave and the scooper away as I think they were useless. When I got into the Glassblowing Merchant’s shop, however, I began to realize that the scooper shouldn’t be thrown...

I’ve tried “/fixquests” but it seemed not work. So I wonder how to get a new scooper. :)

 

It's a quest item, so what you should do is put your entire inventory into your bank and spam /fixquests until you get it. If you get a ton of unneeded quest items, you can get rid of them by filling the 2x2 crafting grid in your inventory with them and filling the remaining slots in your inventory with emeralds or something. After you've done that then closing your inventory should erase the ones that were in the crafting grid.