Blind tasting question

Curious how long a glass can sit poured before the flavour is impaired? I’d like to do 2 blind tastings next weekend, 4 glasses each, but I will be home alone and need someone to pour for me. My question is, if my wife pours 8 glasses before she leaves Friday night, and I aim to have 4 on Saturday and 4 on Sunday, will the taste be impacted? What if I use the Glencairn stopper ‘hats’?

These truly are first-world problems to have.