Good point - and actually, I don't know if you can get hold of it in Spain, but this Bucatstate hide is terracotta and has a lift off top with a space in it to put a small ice pack

But it's why it's so tall. And both my hammies love theirs to sit inside, and it it was placed so the top was near a level they can sit on top as well. It has a false roof inside between the top of the hide and the lift-off top with a gap between them so any ice pack isn't accessible to the hamster.
It doesn't seem to be available on Amazon at the moment (maybe sold out) - maybe available elsewhere?
Terracotta Castle Hide
Also available from Bucapet
•The hiding place is specially designed for small pets •The overall size is 15.5*18cm/6.1"*7.08" (D*H), and the size of the entrance is 2.5"*2.9" (W*H) (ca.6.5cm*7.5cm). •Open the top cover to place two sizes of 8*7.5*2cm/3.1*2.9*0.9 inches Ice bag for Cooling. (This hamster nest does not...
bucapet.com
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