This cache was originally part of a series which included all of the horcruxes from the Harry Potter series. The aim was to collect all the horcruxes before taking on the final cache; Voldemort. Unfortunately I've had to archive some of them and the puzzle aspect but I've left a few popular ones out there. Hopefully I'll re-do it one day! Sorry to those who didn't get to complete the series.
Hufflepuffs cup:
Harry, Hermione and Ron find the cup in Bellatrix Lestranges Vault, after breaking in to Gringots Bank. It is destroyed by Hermione with a Basilisk fang, when her and Ron venture back into the chamber of secrets.
You are looking for a small clip lock pot. Please replace with stickoflage.
This one has become so overgrown that I've moved it slightly. Coordinates are pretty much the same, check the hint and logs for help if need be. No need to venture into the brambles. Please replace stickoflage