There are many words you can use in place of "brown bottle". For instance, you could say "amber vial" or "caramel jar". Another option is "chestnut container" or "coffee-colored flask". If you're looking for something more specific, you could try "mahogany jug" or "russet phial". Of course, there are countless other possibilities - you could even get creative and come up with your own name for a brown bottle depending on its size and shape. No matter which synonym you choose, it's important to use language that is accurate and evocative to help your audience understand the context.