Will Bols elderflower do in a pinch? Can it briefly substitute for .5 st. Germain for a week?

Have a vodka soda cocktail with .5 oz of Elderflower. I'd prefer St. Germain but think I can only get Bols this week. I'd rather not go Bols but anyone used this cheap liquor? With only .5 oz do you think it can do a passible job in a vodka soda cocktail for a week. We were using Thatchers so not sure it's much better. Next I'd like to find other options - St. Germain got pretty pricey the past few years. I've just always avoided Bols for the most part.