One of my childhood school horses was named Pepsi.
For his ability to drink a bottle (yes, I’m that old) of Pepsi by holding it upended in his mouth.
When he was done, he’d politely hand (lip?) the bottle to whoever was closest.
And yeah, your horse has some weird habits 
Cute, but odd 
I had a pony that could drink beer out of a can.
My pony would probably eat anything, but he loves licking people.
There was once in the past a whole thread about Peeps.
Ted the Peep Whore if I’m remembering – it’s not here in a search.
Oh… a mare I used to own was BFF’s with my friend’s mare. In the winter the barn staff would tip a giant ice cube out of the water trough, and they would site there nose-to-nose licking the ice…
My quote function isn’t working this morning but @pony_grandma is correct!
My mare, Paige, is a fellow “peep ho” thanks to COTH.
Paige also loves acorns, which is a real problem because they are toxic. She would rather eat them than lush, green grass and will gorge on them until she gets sick. 
Tony the minidonk likes to chomp on….ME!!! He’s getting better…
A little mustang I had adored granola bars. We were completing a poker ride and one of the competitors who was walking toward her trailer started to unwrap a granola bar. He heard that familiar crinkle and made a beeline for her.
My current horse doesn’t eat anything “weird” except she has taken a bite or two of poison ivy (with no ill effects), has eaten a shrub that grows by the river, I think a mountain laurel, and is obsessed with the leaves of one particular kind of oak tree. Any other kind, she will mouth the leaves but not grab them.
I leased a horse for a while who loved chicken caeser salads.
Every 4-H show I went to with my QH, I had to share my potato chips. He would get his own iced tea.
@chestnutmarebeware, my gelding will devour Likits. He can finish one in less than 12 hours, which is why he gets just one a week. I’d be broke otherwise. 
My gelding also likes the blueberry Belvita biscuits. Only the blueberry ones.
I know that it’s been a while since I updated this thread, but I had to add a few new things to my mare’s list of favorite/weird foods:
Tabasco, of all things! Another horse was chewing on their stall, so we put some the wood to deter them, and my mare was very intrigued by the bottle and kept trying to lick it. I poured a little on my hand for her to sniff, and she not only licked it thoroughly off my hand but did it again after I poured a little more for her.
Fruit baby food purees that she somehow knows to drink right out of the container! All I have to do is tip it up for her and she sucks on it like a human would a straw. https://www.aldi.us/en/products/baby-items/food-snacks/detail/ps/p/little-journey-apple-banana-strawberry-yogurt-baby/
Peanut butter cookies—she politely waits with her nose about 3 inches from the cookie while I break off a piece and eat it and then give one to her. Rinse and repeat!
Peppermints in crinkly wrappers. She weirdly didn’t like peppermints when I first got her, but she’s liked them more every year and is now obsessed, especially when she hears the wrapper! She likes those after dinner mints the most.
The one thing she won’t eat: cat treats, not that I blame her!
Oh yes, my jumper drinks hard seltzer out of the can and begs for more. 
Beer and wine.
Apples but not apple flavoured candies.
Watermelon flavoured candy, but not actual watermelon.
Most flavours of candy and liquorice, but not citrus and not apple. You will be bitten if you try to offer a spat out citrus flavour a 2nd time because, “You are stupid. I did not ‘drop’ it I spat that shit out! Be smarter! Do better! That entire bag belongs in the garbage. Take it away!”
I knew a gelding who loved chicken ceaser salads. You tell me…
My mare will eat anything and everything. Literally. My friend fed her an icecream sundae and chicken nuggets from mcdonalds once. At a show one time, she very politely stole half my steak sandwich. Another time she poked her head over and again, very politely, helped herself to a random strangers lunch!
She has opened a zipped up bag, to get to a zipped up cooler, to steal whatever food was in there. She goes nuts if she hears any sort of packet rustling because that might mean food.
Her favourites are of course apples, carrots and licorice.
Meanwhile my other, recently sold mare took months to come around on licorice, months more on carrots and after two years, still wasn’t sold on anything else as treats!
Haven’t read the entire thread so this is probably not even close to the weirdest since I’ve seen cheeseburgers on a post or two but one of the lesson horses I rode as a kid apparently would drink Mountain Dew (I only heard the story about this, never saw it happen).
Also my mother once accidentally fed dog biscuits to a mule. So - barn I rode at growing up, the dog biscuits were kept in the feed room near the horse treats and the containers weren’t labeled and my mom wasn’t paying attention. I wasn’t around that day, was probably in class at college (community college, commuter student), but she was helping out with some barn thing with a group of schoolkids. Kids were being taught about different breeds of horses and my horse was the only TB there so he was being used as the example of a TB. He was fidgeting a bit (he was pretty laid back but he’d been standing around for a while and was getting bored/probably wanted to go back out in the field) and my mom tugged the lead rope and told him to stand still and she’d get him treats. He stood like a statue for the remainder of the demo.
Mom went to get his treats. Wasn’t paying attention, thought she had horse treats and she did not. Tries to feed the dog biscuits to my horse. He sniffs them and turns his nose up. My mom still does not realize she grabbed dog biscuits by mistake and is like, “fine, dummy (jokingly/teasing on the calling my horse a dummy part), you won’t eat these I’ll give them to (nearby mule).” Mule gobbled the first couple treats right up (mom grabbed a handful) and then one of the barn owners walks over and points out that my mom had grabbed dog biscuits (mom knew what horse treats were, just, the dog biscuits were in the same container and there were some horse treats they had on hand at the time that were kind of shaped like a 3 leaf clover so I could see there being just enough resemblance to a bone-shaped dog treat broken in half at first glance). Mom went back and got the actual horse treats and my horse ate those and all worked out okay.
My pony loves Lays sour cream and onion potato chips. My kids have expanded the horses palates so they are willing to taste pretty much anything.
My gelding eats peanut butter crackers - you know the orange ones. I guess the look like a carrot to him.
The goats at the barn absolutely love these. There’s a drawer of the Toast-chee crackers that is closed with a double-ended snap lest anyone get hungry. They know where they are.
Our donkeys love bananas and oranges, including the peels. The younger mare carefully watched the donkeys eat the peels and decided she should try this herself. Now she’s delighted by peels.
She is also fond of dollar store ginger snaps and dollar store animal crackers. Really any human cookie will do. She really likes beer as well and will mug you for it if you allow it. We’ll pour it into our cupped hands and she’ll lap it up…her favorite by far is IPA.
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