Just looking to gather cute ideas for treasure chest items, I don't have any specific themes in mind (plus I wanted this to be a topic everyone could benefit from regardless of theme), but I did split it up into two categories - under 1 mil and 1-5 mil - however, you can structure your replies however you please :)

I like using stickers in general as (mostly) inexpensive TC items; for example, for my pets Artificial Heart and Solid State, each sticker in their TC is a reference to a song from the albums the pets are named for.

Good idea! I'm thinking about compiling a list of some sort for affordable TC items, I haven't really checked out stickers yet but I deff will

Tbh I love all of the items in Artifacts' TC and they are all under 1m. I have 1m+ items on my wishlist for her TC which I also love so much _

in general i like holiday items since i can hoard the currencies, or melody items/plot items with no purpose since the price on those often stays down for a long while, which is nice because i am cheap because sometimes I need multiples for whatever reason.

specific items is a little more difficult for me (since most of my cheap items are holiday foods) but i'm def pleased with and none of them were particularly expensive or hard to obtain (first two are holiday items, the bouquet is... pricy but not terrible imo, and the others are p cheap).

Under 5 mil:

Under 1 mil:

Um... hm... TCs are my jam but I don't really have much to offer because prices fluctuate a lot and I'll spend whatever I have to on TC items, but these are my favorite items always locked in my inventory:

Same, I've used plushies, beanbags and stickers for TCs. They're cute substitutes for expensive items a lot of the time.