Hi Cutie,
My baby is 1year old when I was travelling. I had to bring a pail and I made sure the hotel room has water kettle to boil water. I've got the pail from DAISO. 2 pails are big enough to sterilise 6 baby bottles. The pails were fit to my big luggage.
Anyway I also brought the water purification tablets to bath my baby.
I think is also depend which country that you will be travelling.
HOpe it helps.
Cheers,