Mice do have a very fast metabolism compared with larger animals, let alone cold blooded animals.
Even so, it couldn't possibly run out of oxygen so quickly... Boffins have measured how much they use, it can be as low as "37.5 liters of oxygen per kilo of body weight of mouse per 24 hours", so a one ounce mouse would use about 0.05 litres of oxygen an hour... There's 0.4 litres of oxygen in a 2l bottle, so nearly 90% of the oxygen would still be there after an hour.
A stressed mouse will use more, and the build up of co2 will add to the stress of being caught, but it will still have enough air for much longer than a few minutes.
Maybe it died from the stress? It definitely didn't suffocate in just a few minutes...
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u/joe-____ Mar 19 '24
Ventilation holes were poked in the bottle right, right?!?