Update: didn't noticed this until now. But beware when you go to the physical store (idk if Washington is the same) as things are marked up way higher than what you can get online,from the same company.
I bought a tank for my new mod. The tank online is $24.99, in store is $31.50. That's $6.60 more than what I could have gotten online. Not including the tax. I noticed that on my previous trips but didn't bother because it was like a couple dollars. But $6+ dollars?! No way. The two stars for convenience and the friendliness of staff.
Definitely check online and confirm with them during check out to make sure you get the price online.