We kept hearing the same thing
Customers would order a 10ml to try a scent in their ZenPlug, and it would run out before they had really lived with it. Then they'd ask us why. The honest answer is that a ZenPlug needs 20ml to give you a proper run. The 10ml existed to hit a price, not to do the job.
We looked at adding a warning at checkout. We looked at asking which diffuser you own every time you ordered. Both make ordering harder. Then we noticed the MistMini and ScentFlow take 20ml too. So we made 20ml the standard, for every scent, for every diffuser, and stopped making 10ml altogether.
The obvious objection is price. We are not the cheapest oil out there and we never will be, but we are a long way from the most expensive. So instead of doubling the price with the bottle, we built a way to pay less per bottle the more you mix, and we are honouring every existing 10ml subscription at its current price. More on both below.
Ban and Buzz, founders
