This humorous tee is a fantastic gift for bird lovers who enjoy birding and watching birds in nature. Ideal for birding enthusiasts and funny birding designs fans. This design includes a Eagle and says Bird Nerd. This humorous tee is ideal for bird lovers and birding enthusiasts. Bird watchers and nature lovers will enjoy this bird nerd design, making it the perfect present. Dual wall insulated: keeps beverages hot or cold Stainless Steel, BPA Free Leak proof lid with clear slider