Id say he's great fun at parties
Really?
I'd say Eric has raised a valid point but IMO has got the facts wrong.
I add a drain hole - through bitter experience I've found less faults that way!
The compromise is to drill a hole big enough for wetness to drip from while avoiding ingress of flora, fauna and animal life.ever it's not water getting sucked in; it'd humidity or moist air.
However the bigger issue with moisture within outdoor enclosures IMO is condensation.
For year my grandmother used to propagate seeds by putting seeds, soil and sand in a 5 gallon glass carboy, give it a good shake so fairly level at an inch or so deep then add a waterproof stopper. Depending on what the seeds were they would either be stood in the garden, shed or scullery. or even beside the range in the living room.
All of the cropping seeds became Granddads domain, he would unseal them and upturned shake them out, if required he'd add water and flush them out and plant in the vegetable plot which I always remember being mentioned as 1/10 acre.
I recall as a small boy having the task of emptying a completely choked carboy with runner beans, complete with beans which were to be used for next years crop.
Granny was much more delicate in the way she retrieved the seedlings with what I'd describe as a teaspoon bend at right angles with a 2 ft handle, somewhat like a ladle.
Sorry must be bored or something for this much memory lane.