Recycled socks make excellent soda bottle SIP covers ("cloth cachepots"). This one year old Ficus benjamina cost next to nothing. The plant was propagated from cuttings rooted in the same planter about one year ago. The soda bottle SIPs are free and you help the environment. The polished pebbles cost just pennies.
There are single socks and socks with holes just waiting for a higher calling in life. This is it! It's their big chance! You can help them.
Incidentally, the Ficus is the same houseplant shown in this prior post.