The plastic pie liners that come on top of graham cracker pie crusts are wonderful to put under your potted plants as drip pans. They are sturdy enough to keep the drips from getting on the table or wherever the potted plant is.
By Elaine from OK
How do you tent a houseplant?
By Linda Valentine - Spokane WA
There are several ways to tent a houseplant, the best ways include a supportive frame (bamboo skewers, coat hangers, etc) so that the tenting doesn't touch the foliage of the plant. Also important is to monitor the heat being generated by the tenting to make sure the plant is not over-heated.
Do a Google image search to see pics, that's the easiest way to figure out the best method for your particular plant and environment.
Plastic bags work well; but do check on heating, so as not to harm the plants. Your library will have books for this or use the search engines on your computer-Google, Yahoo, etc.