Gifts to go with bouquets in Amsterdam: what stays once the stems fade
Gifts to go with bouquets in Amsterdam start from a city whose floating Bloemenmarkt on the Singel has traded since 1862, yet today it deals mostly in bulbs and souvenirs, and only a handful of stalls still sell fresh cut stems. A bouquet fades within days, so the gift chosen to go with it is worth picking by how long it needs to last. Sweets and a balloon belong to the day itself, a card stays as long as someone keeps it, and a diffuser or a candle can run on for weeks.
Chocolate, marshmallow stems and a balloon for the day itself
The chocolate that travels with a bouquet here comes from German and other European brands: Ritter Sport, Milka and merci. July in Amsterdam averages around 19°C, well below the 34 to 38°C at which cocoa butter melts (Amsterdam weather and flowers).
A marshmallow bouquet comes in the same order as the real one: it looks like a bouquet but is built from marshmallow rather than stems, giving the order a second, sweeter arrangement alongside the flowers.
A latex balloon filled with helium stays afloat for about half a day, enough for a single afternoon, while a foil balloon holds its lift for several days and suits a celebration that spreads over more than one.

A card with a message costs nothing extra, and the courier hands it over together with the bouquet. Signing it or leaving it anonymous is entirely the sender's choice, since nothing on the card gives the sender away unless they put their name on it.
Greeting cards made for bouquets form the largest group of extras in this section, and they are where most people start when the gift needs to say something the flowers cannot. A topper carries the message further in, a short line on a pick that stands among the stems rather than sitting beside them.
Some orders start from the person who will receive them rather than the item itself, which is the idea behind the gifts-by-recipient section.
An entertainer is booked rather than bought. For a restaurant table the timing is arranged with the venue in advance, landing with dessert, with a toast or as someone steps on stage. Anyone planning one can book a performer ahead of the date.
Reed diffusers and candles for an Amsterdam flat, long after the stems
The Singel market lives on things people carry home, bulbs rather than cut stems, and at home a diffuser plays much the same part. Rattan reeds draw the scented oil upward purely by capillary action, and flipping them every few days keeps fresh scent moving into the room.
A bottle runs for weeks or months, well past the roughly one week a rose holds in a vase, which makes it the gift that is still going once the bouquet itself is not.
A vase travels in the same delivery as the flowers, so the bouquet arrives with something to stand in. Both are in candles and vases.

Where to start depends on what the gift needs to do. A message points towards greeting cards made for bouquets, a lighter touch towards marshmallow bouquets, and anything meant to outlast the flowers towards reed diffusers.