Stupid Tongue Twisters

Part 57

If Pickford's packers packed a packet of crisps would the packet of crisps that Pickford's packers packed survive for two and a half years?  

Can you guys say this without messing up? I tried to say it and I kept failing, but a friend tried and said it perfectly fine. Are there other people who can't say this, or am I just really bad at it?

I'm going to go with the second one...