While browsing the forums, I saw someone mention that the pebble to moonstone ratio was going back up again. They said the June update companions didn't last long enough, and honestly I do agree.
So! Here's a more permanent pebble sink idea. Let us buy the vouchers for the weekly shops with our pebbles.
My reasoning for this is that sometimes the shops have really valuable items such as the chef outfits from this week. I really wanna buy them, but I can only reasonably buy a single 45 voucher item from grinding cooking.
I'm not good at pricing stuff, but maybe it could be priced at 1 voucher for 1000 pebbles? That's just my guess, based off of the small pebble sinks from the various professions. What do you guys think?