Oral/Oil vs. US Customs

[Phiba Optik]

Hey folks I'm going to make this as short as I can. I was researching some online sources and looking at different options, prices etc. and I noticed a lot of people (in general) making comments regarding their order's being seized by customs. What I was wondering is that are orals less detectable than oils? I personally think so because I think vials with oil are easier to identify compared to pills in an container that says "vitamins" or something! So anyone else want to chime in?

Note: Not asking for sources or giving any so that's that.