Matching owalas for my sister and I

I want to get matching owalas for my sister and I, mothers day is a little ways away but she does have a daughter so I thought that'd be a nice occasion.

She has a 24 oz deep space she got customized on Etsy

I have a 32 oz holiday magic

I was thinking of getting the snowglobe tumblers?

If anyone has any other ideas I'm open to suggestions.