I had read this thread with great interest and with much trepidation, ordered the Go-Girl and the Travel John disposible urinal.
I did my first trip with the golden retrievers and the disposible urinals this weekend. The Travel John worked like a charm! Holds upto 800 mL. Tinkling in the teardrop on your knees is a wee different (pun) than standing up. I would suggest a towel or other absorbant material underneath just in case of drips. I used the Go Girl in combo with the Travel John because the opening of the Travel John looked a little, um, too slender. The Travel John's absorbant material worked great. No tip-over accidents.
Thank you for this enormously entertaining and informative thread!
Hugs,
Ratkity