For your tacos to be securities, the company would have to be working in some capacity to give those tacos more value in the future. Since tacos expire, all reasonable taco investors know that their investment will go to $0 in the near future, therefore no expectation of profit.
It's amazing how broadly security is defined and enforced. The only examples I was able to discuss with the SEC that were not securities were when the asset being sold could not reasonably generate a profit and could not be transferred. Basically like selling a product or accepting a donation.
There is also securities case law where a company sold a security to a single person or very few people and they were sued successfully.