People should follow the replacement schedule and cleaning procedure suggested by their eye professional. That said I don't accept the bogus analogies and false information found in this, and similar threads.
Yes the material in one day
contacts and 2 week contacts is the same
B&L Dailies 41% (hilafilcon B)
B&L Sof Lens 59 41% hilafilicon B 2 week lens
J&J Accuve 42% Polymer (etafilcon A) daily
J&J Accuvue 42% Polymer (etafilcon A) 1-2 weeks
Biomedics 1 Day (ClearSight 1 Day) 48% Polymer (ocufilcon B) daily
Biomedics 55 45% Polymer (ocufilcon D) 1-2 week lens
The difference between 48% and 45% isn't the difference between china and plastic plates.
They're all plastic. The analogy is bogus.
The FDA's website confirms one lens was approved for both daily and planned replacement sales. Clearly that lens can be safely worn for more then one day. I previously posted the quote from the website. I won't identify the lens. I don't want to suggest people who wear that lens should re-use the lens without consulting their doctor.
There may be some manufacturing differences which suggests some one day contacts can't be re-used but there is a lot of evidence which suggests most one day lenses can be cleaned and re-worn.