I doubt they would let you bring in a cooler there is a cafe there if you want something to drink, and they will stamp your hand so you can get back in if you want to leave
I don't know if coolers are allowed in the aquarium or not, but I wouldn't suggest anyone to bring a big cooler because inside the aquarium is not spacious enough and could become a bit of burden
We brought in snacks for a baby and 4 yr old but not in a cooler and it was fine
They don't allow outside food and beverage.
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