How long (Diaper bag)

Sy👶🏽🎀
My question is how long do moms usually use a diaper bag for ? 
Till your LO is 1 years old or 2? 
As they get old and out of diapers, what's in the bag besides extra clothes/wipes/toys/snacks. 
I'm wanting to upgrade my diaper bag  but don't want it to be a waste of money. My LO is 5 months old...

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