AITAH for wanting to put stickers on a water bottle I was gifted?

Alright Reddit, I cannot believe I’m posting about this but it’s caused a fight between my boyfriend and I, and I feel like I’m taking crazy pills so I need some perspective here.

My (21F) boyfriend (25m), just surprised me with a yeti water bottle out of no where. While I’m very appreciative of this I want to make clear I didn’t ask him to do this; and his reasoning was that he thinks someone is going to poison me with the straw style of water bottle I use now.

The water bottle in question is brown, they didn’t have my favourite colour and he bought it at a store that was closing so no worries there not his fault. My favourite colour is green and I love plants, at some point i casually mentioned putting some stickers on it to make it feel more like mine. And he got upset, telling me it looks childish and that that’s unnecessary, and that he didn’t want me to. He also mentioned that he may use it and he’d be embarrassed if it had stickers on it.

I should also mention that before I found out it was final say I approached him and asked if it was final sale. And then clarified saying I’m grateful for it and I appreciate the gesture, but I was just looking at a similar, cheaper one on Amazon so if this can be returned why don’t we get that instead? It saves you money, I get one I want win win. I can see how this maybe came across wrong and I apologized for it but it didn’t seem to do much.

TLDR: boyfriend gifted me a water bottle, I said I want to put stickers on it and he basically told me I couldn’t and that it’s childish.