Excellent except they wrinkle over time

Very nice product. One small problem the foil slightly wrinkles after some time. It looks perfect at moment of application, but later wrinkles on curved surfaces like water bottles and growlers. I replaced the 1st sticker and again after a short while the foil seems to wrinkle like it has bubbles or something, however the initial application was perfect, placing it on a curved cup starting at thee center and smoothing the sticker towards the edges with no bubbles or wrinkles. Not sure why or how to resolve. I like the product but it doesn't work right as my application is for curved surfaces. It appears the holographic foil stickers can only be applied to flat surfaces. Please advise.