Waking up thru the night

Hi, our 15 month old baby girl was sleeping through the night for the past few months but lately she’s been getting up during the night. She wakes up, cries and stands up in her crib. Any advice on how to get her back on track? We know she’s not sick.

One more question: we help her to sleep by giving her a bottle (sippy cup) of water and she drinks from it and fall asleep. We would like to move away from this routine and help her put herself to sleep without a bottle. Any advice here would be appreciated too! :)