My first thought was a roll up cigarette, but that would be smoke and not steam so I figured it’d be worth asking!
I’ve had a quick glance at the Wiki, and then at the other Wikipedia which gives a few unsteamy options…
[quote]An infusion is a very simple chemical process used with botanicals that are volatile and dissolve readily, or release their active ingredients easily, in water, oil or alcohol.
The botanicals are typically dried herbs, flowers or berries.
The liquid is typically boiled (or brought to another appropriate temperature) and then poured over the herb, which is then allowed to steep in the liquid for a period of time. The liquid may then be strained or the herbs otherwise removed from the liquid.
Unless the infusion is to be consumed immediately, it may then be bottled and refrigerated for future use.
The amount of time the herbs are left in the liquid depends on the purpose for which the infusion is being prepared. Usually steeping for not more than 15 to 30 minutes, or until the mix cools, will create a beverage with optimal flavor. Steeping for a longer time typically results in a somewhat bitter-tasting infusion. Four (4) hours, however, is a more appropriate length of time for achieving herbal potency if health benefits are the priority. Quantities of the herb and liquid used will vary according to the herb or how strong the infusion is required to be. A common proportion used is 28 g (one ounce) of herb to 0.5 L (one pint) of liquid.
There have been several accessories and techniques for removing the steeped or left over products that were used to infuse liquids such as water, oil, or alcohol.
The use of a metal steeper, which looks like a metal clamp.
Tea infusers work as strainers and assist in removal of used herbs,leaves, etc., from over steeping or leaving residues.
French presses are commonly used to infuse water with various teas and coffee.
Lastly, and most commonly used, the tea bag.
Tea bags today are made with filter paper and filled with various tea flavours.
Examples
A common example of an infusion is tea, and many tisanes are prepared in the same way. Lemon, chamomile, senna, apple, ginger, rooibos, and a great many other plants are used individually or in combination.
Herbal infusions in water and oil are both commonly used as herbal remedies.
Coffee can also be made through infusion (as in a French press), but is more often made through percolation.
Plants with desirable flavours may be steeped in an edible oil or vinegar for an extended period; the infused oil or vinegar is often sold still containing the plant, and is then used as flavouring. Chiles, lemon, garlic, and many other plants may be used.
There can be ambiguity in the labelling of these oils: for example, what is described as sesame oil may be oil extracted from sesame seeds, or another vegetable oil infused with sesame.[/quote]
Is everyone just using teabags as their physrep?