The "W.C. Munn Co., Made for Everything" circular tee stand appears to be made from celluloid. WC Munn and Company was the largest department store in the south when it was built in 1913 by Wiley Cooper Munn. The tee itself was made for WC Munn by Whitehead & Hoag, of Newark, New Jersey. Munn died in 1938.
The other vintage circular tee is made from rubber.