Flowers in boxes in Bangkok: stems in foam, a lid or handles to carry
Flowers in boxes in Bangkok arrive with their stems already standing in wet foam, so there's no vase to find, and in April, the city's hottest month, afternoons average about 36°C while the air conditioning runs indoors — see how Bangkok's seasons treat a bouquet. The choice then comes down to shape: who lifts the lid, who carries the handles, and where the box will stay once it arrives.
A lid lifted later: the hat box for a Thai recipient
Hat boxes make up the largest part of the section, round boxes with a lid that sits over the flowers rather than wrapping them. In Thailand, gifts usually stay wrapped until the giver has stepped away, and a hat box fits that custom simply because its lid lifts off whole, with no paper to tear through.
Inside, it's roses. Jumilia buds open to about seven centimetres across, white at the base with a pink edge, and with good care they last close to two weeks. Reflexed roses, sometimes called French roses, are a florist's trick rather than a variety: the outer petals are turned back by hand so the flower reads as fully open from the moment it's delivered.
A hat box is carried the way its lid sits, upright and level, held in front of the body rather than swung by a strap.

Handles for a day in Siam, jute or a crate for home
A flower handbag swings from its handles like an ordinary bag. That suits a recipient carrying the gift onward, say through Siam or Ratchaprasong in Pathum Wan, where some of the largest shopping centres in Southeast Asia stand side by side.
A jute pot or a crate is built to be set down, and a hanging basket to be hung, wherever the flowers finally land; inside each one the stems stand in the same wet foam as the hat boxes. The flower handbags sit alongside jute pots and crates and hanging baskets as the section's sturdier, set-down formats.
A box of macarons can travel next to the flowers rather than instead of them, so the one gift carries something sweet as well as something that lasts.
Flower box delivery in Bangkok, then water for the foam each day
Payment comes first, then the florist buys the flowers and builds the box to that one order. Before the courier leaves, a photo of the finished box goes out, so a change can still be asked for. Most orders for a flower box in Bangkok are delivered the same day they're placed, with the exact timing shown on each box's own page.
A hotel, an office or an order sent from abroad are handled the same way as for any bouquet, and delivery zones across the city are listed on the delivery page.
Once it arrives, the foam needs water every day: a thin stream across the whole open surface, not just under the flowers, with the box kept level rather than tilted. Foam that has dried out barely takes water back, so a missed day shows.

Start with the hat boxes if the gift is likely to be opened at home, with the lid lifted rather than the paper torn. For a sweeter version of the same idea, macarons in boxes pair the flowers with something to eat.