Rainbow Honey recently introduced a subscription bag that started this month, offering the mini or the large size Mystery Bag for $10 or $25 per month respectively. It seems they will still be offering the one-off monthly Mystery Bags as well. It's a great way to try their new products first, because they get released in the Mystery Bag before they are sold separately on the site. Each version includes 3 completely new polish colors, and a few other beauty products that are new as well.
They have been really busy lately with new customers and tons of orders so sometimes they aren't shipped as quickly as they used to be (unless you subscribe, those are always shipped out at the very beginning of the month), but their customer service is amazing, so any problems you have don't hesitate to contact them.

