Similar experience on some recent flights. Flew ATL-LAS 12/29 and they had the Tip Top cans and plenty of them. Return LAS-ATL on 1/1 they didn't have them and FA was surprised. She thought it was just her cart but she checked with other cart and then came back and said they must not have been catered. They did have Woodford though.

On 1/9 flew ATL-LAS in 1st and asked for old fashioned, FA checked galley and again was surprised they didn't have. Said they must have not catered correctly. 1/11 return to ATL the FA told me that they had stopped carrying Tip Top. Still plenty of Woodford.

My brother's wife is actually a Delta FA and she isn't aware of them ending the contract or anything like that. But she did say they were having some supply issues with the cans on some of her flights and it was hit or miss.

Will have to stop by local liquor store to see if they still have them as Tip Top is local. They're handy to keep around.