Looking for muzzle recommendations for 9 week old puppy that likes to nip around my small children

[Sasha_GSD_Rescue]

Hope everyone is doing great! As the title says, my 9 week old pup likes to nip at my 2 young boys. So, would like to introduce a muzzle to help curb this while the pup is getting used to her bros in new environment. Thoughts on muzzle brands that have worked well and also looking to understand how long per session should she be wearing the muzzle. Don't want to put her through too much physical or mental stress during the muzzle session.