I have two Belmont 600's like this:
https://www.amazon.com/Prestige-Grou.../dp/B003V0PZS8
They do not seal tight at all but I have had zero issues with either one. Have calibrated hygrometers several times and they hold at 68% even in the dry Alabama summers. Shop around. The first one my wife bought me for Christmas for $389. The second I stumbled upon on craigslist new for $100. Both of mine have a Xikar disk and an Oasis pack. By themselves, Oasis packs are garbage but pairing them with a medium Xikar disk, they do quite well.