Flowers in a hat box: there is nothing here to knock over
A filled vase is a tall thing with all its weight at the top and open water inside it. A sleeve catches it, a cat investigates it, a car brakes, and the water ends up on a table, a document or a car seat.
A round box behaves in the opposite way. The base is wide and flat, the water is held inside a block of soaked foam rather than sloshing about, and every stem is fixed at the angle it was set at, so tilting the whole thing does not rearrange it.
That is a duller virtue than the look of the flowers, and it is the reason this shape keeps being ordered.
Households where it matters
Homes with cats, chiefly. A vase on a windowsill is an invitation and a box is not, since there is nothing to topple and nothing to fish drinking water out of.
Small children come next, then anyone unsteady on their feet, then the person recovering at home who should not be carrying anything heavy to a sink. Filling and moving a vase is more work than it sounds when you are ill.
Offices are the fourth group. A round box holds its shape on a desk through an entire week of people setting cups down beside it, and nobody has to think about it again.
On a table
The height is what makes it usable at dinner. Guests look across the flowers rather than around them, which is why the low round shape appears in restaurants and boardrooms far more often than a tall arrangement does.
Put something under the box. The base holds wet foam behind a liner, and although a good box keeps that in, a card wall standing on polished wood for a week can leave a ring anyway.
Turn it once every day or two if it stands against a wall, because flowers lean towards the light and a box left in one position gradually goes lopsided.
Water and warmth
Pour a thin stream at the rim until the top of the foam stops taking it, then leave it alone until the next morning. Never pour over the heads themselves, since water sitting between petals browns their edges within a day.
The rest of the lifespan is decided by temperature. A radiator shelf, a draught from an air conditioner and a patch of afternoon sun each shorten it, and moving the box to a cooler corner does more for it than anything you add to the water.
What to look at when it arrives
Three things, and none of them takes long. Press the foam at the edge with a fingertip: it should spring back and leave your finger damp. Look between the heads and under the rim for a bare wet block, glue marks or an empty gap where the planting stops short of the wall. Check that the outer flowers reach the rim rather than leaning on it.
A word on what the format cannot do. Stems are cut short to stand in shallow foam, so the arrangement will not be divided between rooms and will not move into a vase later.
Flowers in a hat box arrive complete, and for a recipient in Batumi with no vases and no patience for stems in a sink, complete is the whole point.