They must have put those small sample bottles in so many things at the time. At any day on the bay you can see 10 for sale. Small little green bottle, no label but 3 in 1 embosed in the side. I was also surprised that all these manufacturers recommended 3 in 1. Absent are players like Winchester, they sold their own oil, their cans can go for real $. Most people just don’t associate 3 in 1 with guns I didn’t either till I started looking. Like you said you learn something everyday.