You will find that an unbranded tee like this is a reliable basic.
I Have Been Married for 60 Years – 60th Wedding Anniversary T-Shirt
The unbranded style here means you can wear it to work or on weekends.
New Yes Band – Close To The Edge Shirt Classic Green Unisex Size S-5XL
This T-shirt is unbranded, giving you a clean canvas for your creativity.