Coffee & Tea mugs

Hi everyone,

What are the rules around buying new coffee & tea mugs? 

I currently have some ok mugs I use at home, nothing wrong with them but they look super boring. Then I've seen some really cute ones at Tesco, but I don't know what the rules are around stuff like this. I kind of feel like I need to make a decision around stuff like this that I will have to stick with for many many years, which makes the decision around buying things like this super difficult as I need to look at everything that's available before I am able to make a decision. And I can't even being with the sustainability rules around this, completely freaks me out the amount of data I'll need to take in to account. 

So how do you deal with it?